Sony A900 Overview索尼a900概况

Review Posted: 09/09/08 审查发布时间： 09/09/08

Review by Dave Etchells, Shawn Barnett, Zig Weidelich, and Stephanie Boozer 审查由Dave etchells ，肖恩巴内特，之weidelich ，和斯蒂芬妮布泽尔

Overview by Mike Tomkins 概述由Mike汤姆金斯

The Sony A900 has to rank among the most anticipated digital SLRs in recent memory.索尼a900已跻身最令人期待的数码单反相机在最近的记忆中。 The company first showed an early version of its upcoming flagship design at the Photo Marketing Association tradeshow in the spring of 2007, and at the following year's show Sony revealed a few more details about the image sensor and stabilization mechanism it would use.该公司首先表明，早期版本的其即将推出的旗舰设计，在照片营销协会商展在2007年春季，并在次年的显示，索尼透露了一个数的更详细资料，图像传感器和稳定的机制，它将使用。 With the Alpha A900 featuring a full 35mm frame-sized image sensor, Sony has joined a rather exclusive club.与阿尔法a900具有充分三五毫米帧大小的影像传感器，索尼已加入了俱乐部，而不是排他性。 To date only four companies have offered full-frame digital SLRs.迄今为止，只有四家公司提供了全画面的数码单反相机。 Of these, two - Contax and Kodak - have since left the digital SLR market altogether.这些，二-康太柯达-自从离开了数码单反相机市场共有。

That leaves Sony in a head-to-head battle with the two giants of the photographic industry - Canon and Nikon.这使得索尼在一个头部，以头战役与两个巨人的摄影业-佳能和尼康。 Each rival offers two full-frame digital SLRs - a mid-range model at around $3000 MSRP, and a pro model for double to triple as much.每个对手提供了两个全画面的数码单反相机-中程模型在3 000美元左右，建议零售价，和一个亲模型增加一倍，高达三倍。 Sony looks to have rather stirred up the status quo by pricing its flagship at around the same as its competitors' mid-range models, but offering a specification that seems to lie somewhere in between the competing mid-range and pro models -- and in some cases such as sensor resolution, actually leads the field.索尼期待有，而不是激起了现状，定价其旗舰左右，同时作为其竞争对手的中程模式，但提供了规范，似乎在于在某处之间的竞争，中程和亲模式-和在有些情况下，如传感器的决议，事实上它导致了外地。 The Sony Alpha A900 has a whopping 24.6-megapixel resolution from its full-frame Exmor CMOS image sensor -- the highest sensor resolution of any 35mm digital SLR yet announced.索尼阿尔法a900已高达24.6万像素的决议，从它的全帧exmor CMOS图像传感器-最高的传感器解决任何3 5毫米数码单镜反光尚未宣布。 To handle all the data produced by the high-resolution imager, the Sony DSLR-A900 uses dual Bionz image processors, and this allows for five frames-per-second shooting for up to 11 JPEG or 13 RAW frames.来处理所有的数据所产生的高解析度成像仪，索尼数码单镜反光相机- a900使用双bionz图像处理器，这使5帧每秒拍摄多达11张JPEG或13帧的原料。

The sensor is mounted on a moving platter that allows for in-camera image stabilization, branded as SteadyShot Inside.该传感器安装在一个移动盘，允许在相机的图像稳定，品牌作为steadyshot内。 That's another world's first for a full-frame digital SLR, and it's no mean feat when you consider that the sensor shift mechanism has to deal with the extra weight of a full-frame sensor.这是另一个世界上第一个全画面的数码相机，它的没有意思的壮举时，你认为传感器转变机制，以处理额外的重量全画面的传感器。 The various DSLRs seen to date that feature sensor shift stabilization all have significantly smaller 1.6x crop sensors.各dslrs看到的日期功能传感器转向稳定都有显着较小的1.6倍作物传感器。 Sony rose to the challenge by designing a new more powerful sensor shift mechanism, and rates the Alpha DSLR-A900 as good for a 2.5 to 4-stop improvement.索尼上升到面临的挑战，设计了一个新的更强大的传感器转移机制，以及利率阿尔法相机- a900一样好，为2.5至4一站式改善。

The Sony DSLR-A900's body is constructed from five main magnesium alloy sections, and includes sealing to reduce ingress of moisture between the body panels, as well as at the various control dials and buttons.索尼数码单镜反光相机- a900的身体构造，由五个主要的镁合金的部分，包括密封，以减少水分渗入之间的车身板件，以及在各控制转盘和按钮。 The Sony A900 has a Sony Alpha lens mount that also accepts Konica and Konica Minolta glass.索尼a900有一个索尼阿尔法镜头卡口，也接受了柯尼卡美能达和柯尼卡美能达的玻璃。 A large pentaprism sits above the lens mount, both dictating the camera body's workmanlike visual aesthetic, and providing a very large and bright TTL optical viewfinder with 0.74x magnification.大五棱镜坐在上面的镜头安装，无论是口述相机机身的workmanlike视觉美学，并提供一个非常大的和光明的的TTL光学取景器与0.74x放大率。 The rear panel features a large 3-inch LCD display with 921,600 dot resolution, equating to VGA (640 x 480) pixel with three R, G and B dots per pixel.背面具备大型的3英寸液晶显示器与921600点决议，等同于为VGA （ 640 × 480 ）像素与3俄，克和B每个像素点。 This is used solely for reviewing of images, as well as for menus and status display; the Sony Alpha DSLR-A900 doesn't offer live view capability.这是纯粹用于审查的图像，以及为菜单和状态显示;索尼阿尔法相机- a900不提供生活的看法的能力。 There's also a small top-panel status LCD which indicates remaining shots and battery life, as well as the basic exposure variables.也有小的顶级液晶面板的地位，这表明余下的拍摄和电池寿命，以及作为基本暴露的变数。

The Sony Alpha A900 offers ISO sensitivity from 200 to 3,200 equivalent, but is expandable to ISO 100 to 6,400 equivalent.索尼阿尔法a900提供的ISO灵敏度从200至3200等值，但可扩展为ISO 100至6400同等学历。 Shutter speeds range from 30 to 1/8000 second, plus a bulb setting, and x-sync is 1/250 second (or 1/200 second when SteadyShot is enabled).快门速度范围从30至1 / 8000秒，再加上长时间曝光设定，和X同步1 /二五零秒（或1 / 200秒时steadyshot启用） 。 Metering is achieved by a 40-segment honeycomb sensor, and you can also choose from center-weighted or spot metering modes.计量是实现了由40段蜂窝传感器，您也可以选择从偏重中央或重点测光模式。 Focusing is achieved courtesy of aa nine-point phase detection autofocus system with f/2.8 dual center cross sensor, and there are also ten supplemental AF-assist points arranged adjacent to the main AF points.重点是实现礼貌机管局9点相位检测自动对焦系统，镜头的双中心交叉传感器，也有十补充AF辅助点，安排了毗邻的主要点自动对焦。 There's no built-in flash in the Sony A900, with the design instead offering a hot shoe and PC flash sync terminal to cater for external flash strobes and lighting setups.有没有内置在Flash在索尼a900 ，与设计，而是提供一个热点擦鞋和PC闪光同步终端，以应付外部Flash strobes和照明设置。

The Sony Alpha DSLR-A900 has dual flash card slots, and hence can store images on either CompactFlash Type-I or Type-II cards (including Microdrives), or on Memory Stick Duo cards.索尼阿尔法相机- a900具有双重闪存卡插槽，因此可以存储的图像就不是的CompactFlash型I或第二类卡（包括微型） ，或对Memory Stick Duo记忆卡卡。 The Sony A900 draws its power from a proprietary NP-FM500H InfoLithium rechargeable battery that's rated for about 880 shots per charge, to CIPA testing standards.索尼a900提请其权力由一个专有的NP - fm500h infolithium电池，可充电电池的额定约880次出手负责，电池测试标准。 Connectivity options include both USB 2.0 High Speed for computer connection, and both standard and high definition video.连接选项包括USB 2.0高速电脑连接，双方的标准和高清晰度视频。 For standard-def, there's NTSC / PAL switchable composite video output, while high-def is achieved via an HDMI connection.为标准高清，还有的NTSC / PAL可切换的复合视频输出，而高画质，是实现通过一个HDMI连接。

Sony A900 Pricing and Availability索尼a900的价格和供货情况

Pricing for the Sony Alpha A900 is set at about US$3,000, with availability slated for November 2008.定价为索尼阿尔法a900是定于美国约3000美元，与供货定于2008年11月。 Pre-orders will be accepted online from September 10th.前订单将接受网上从9月10日。 The product bundle includes the camera body, battery and charger, wireless remote commander, and eyepiece cup.该产品捆绑，包括机身，电池和充电器，无线遥控指挥官，接目镜杯。 There's also a range of software in the bundle: Image Data Converter SR, Image Data Lightbox SR, Remote Camera Control, and Picture Motion Browser.也有一系列的软件中捆绑：图像数据转换器简，图像数据的灯箱简，远程摄像机控制，图片和议案的浏览器。 This last application is Windows-only, while the remainder are included in both Windows and MacOS versions.最后这是Windows的应用只，其余则是包括在Windows和的MacOS版本。

Sony A900 User Report索尼a900的用户报告

by Shawn Barnett 由肖恩巴内特

It takes but a glance to see that the Sony Alpha A900 is unique among modern digital SLR cameras.需，但一目了然地看到，索尼阿尔法a900是独一无二的现代数码单反相机。 The large, pyramidal shape behind the SONY logo suggests that a very large pentaprism glass element lies underneath.大，金字塔形状的背后，索尼标志表明，一个非常大的五棱镜玻璃镜片下的谎言。 A quick glance through the viewfinder completes the impression: it's like a room in there, into which it seems you might fall if you're not careful.快速浏览，通过取景器完成的印象：它就像一个房间，在那里，到它似乎你可能落入如果您不小心。 35mm camera owners from the last century will find the Sony A900's viewfinder comforting, then quickly forget about it and begin composing with an impressive photographic tool. 35毫米相机的业主，从上个世纪会找到索尼a900的取景器安慰，然后很快忘记它，并开始撰写与令人印象深刻的摄影工具。

Like its predecessor the Sony A700, the Sony Alpha A900 is big and boxy, not attempting to appear sleek, it looks more like a big industrial device, as cameras once did.像它的前身索尼Samsung ） ，索尼阿尔法a900是个大国boxy ，而不是企图以圆滑的出现，看来更像是一个很大的工业设备，摄影机，一次也没有。 Yet it fits well in the hand: a machine to the eye that is nevertheless well crafted for the human intended to use it.但它正好在手：一台机器到眼睛是不过，以及精心为人类打算使用它。

Its weight is substantial, at 2.07 pounds (939g) without a lens, but with a battery and CF card (that's lighter than the Nikon D700 and just a little heavier than the Canon 5D); and it measures 6.1 x 4.6 x 3.2 inches (156 x 117 x 82mm).其重量相当可观，在二点○七英镑（九三九克）没有一个镜头，但与一个电池和CF卡（即的打火机比尼康d700和只是一个小较重的，比佳能5 ） ;和它的措施， 6.1 x系统4.6 X三点二英寸（ 156 x 117 x 82毫米） 。 Add the Zeiss 24-70 f/2.8 zoom lens and the Sony A900 really gets heavy, coming in at 4.17 pounds (1,894g).添加蔡司24-70镜头变焦镜头和索尼a900真正得到沉重，未来在在4.17英镑（一千八百九十四克） 。

The Sony A900's front panel looks a lot like the A700, though the handgrip bulges a bit more into the hand, and the Mode dial is positioned straight and level, while the A700's was mounted at a slant.索尼a900的前面板看起来很多，如Samsung ） ，虽然把手bulges多一点进入，另一方面，模式转盘的位置直和水平，而Samsung ）的被装在一个倾斜。 Missing from the front of the grip is the Grip-sensor that was part of the Eye-start AF system.失踪的前端抓地力是抓地力传感器，这是一部分，眼启动自动对焦系统。

Just under the bright orange Alpha logo is the PC flash sync terminal, covered with a rubber flap.刚刚下光明的橙色字母标志是在PC闪光同步终端，涵盖了与橡胶瓣。 Like all other rubber flaps on the Sony A900, this terminal cover swings open and stays open, as it's hinged to the camera, rather than the rubber itself serving as a hinge.象所有其他橡胶皮瓣对索尼a900 ，这个码头包括秋千开放和保持开放，因为它的铰链安装在相机上，而非橡胶本身作为一个铰链。 That means you don't have to fight with it as you make your connection.这意味着你不必要争取与它会让您的连接。

The Sony A900's grip has a comfortable finger groove for the middle finger, in which the infrared Remote Commander sensor is nestled.索尼a900的抓地力有一个舒适的手指槽中指，在该红外遥控指挥官传感器是坐落。 The inside of the grip is indented for a better finger grip, as is the front of the camera between the grip and lens, which is fairly obvious in the photo above: a very nice touch that those with long fingers will appreciate.内抓地力是缩进一个更美好的手指的抓地力，作为是在摄影机前之间的抓地力和镜头，这是相当明显，在上述照片：一个很好的接触，那些长期的手指会明白。 Textured rubber surrounds the grip areas both left and right of the lens.纹理橡胶周围地区的抓地力都左和右的镜头。 The bottom of the body on the left (on the right side in this image) is tapered to allow a more comfortable fit into your palm as you reach your fingers around to the lens barrel.底部的身体在左边（在右边在这方面的形象）是锥形，让更舒适的融入您的Palm作为您达到您的手指周围的镜头桶。

The rear of the Sony A900 is laid out identically to the Sony A700.后方的索尼a900是提出了相同的，以索尼Samsung ） 。 Positions are slightly different, with the LCD taking up less of the overall space, mostly because there's more width overall.立场稍有不同，与液晶显示器占用少，整体空间，主要是因为有更多的整体宽度。 The left side tapers away just left of the LCD, somewhat minimizing the bulk of the bulge at the left, giving your nose a little break as well, as you move your right eye up to the viewfinder.左侧tapers远离刚离开的液晶显示器，有点最大限度地减少了大部分的隆起在左边，让您的鼻子有点突破，以及，正如你提出你的右眼到取景器。

The Sony A900's LCD is the same resolution as was on the A700, with 921,600 pixels, and a transflective (both transmissive and reflective) design, meaning that in bright daylight you can still frame images.索尼a900的液晶显示器是一样的决议是关于Samsung ） ， 92.16万像素，并透（透射和反射）的设计，也就是说，在明亮的日光，您仍然可以frame图像。 Checking exposure accurately is a little harder, but that's what histograms are for.检查曝光准确，是有点困难，但是这是什么直方图。 Note that though it's a hot feature on many of the latest digital SLRs, the Sony A900 has no live view mode; however, there is a new Intelligent Preview mode that can serve on occasion, and do a few tricks.请注意，虽然它的一个热点功能，许多最新的数码单反相机，索尼a900已经不会有活视图模式;不过，有一种新的智能预览模式，可以对之际，做一些技巧。 More on that later.更多的后来。

Note that though there are still infrared sensors beneath the optical viewfinder, these are only for turning off the LCD when you put the camera up to your eye; Eye-start AF is no longer a feature on the Sony A900.请注意，虽然仍然有红外传感器下方的光学取景器，这些都是只有关掉液晶当你把相机，能够满足您的眼睛;眼启动自动对焦不再是一个功能上，索尼a900 。

The rear Status display also opens up the option to change many settings right on the screen.后方状态显示器也打开了选择变更的许多设置的权利，在屏幕上。 Just press the Fn (function) button and use the joystick above it to navigate around the screen.只要按下Fn的（功能）按钮，并使用操纵杆，它上面的浏览周围的屏幕上。 Pressing down on the joystick activates your selection, which you can modify with one or the other control wheel (the rear or front wheel).迫切的下跌对操纵杆激活您的选择，您可以修改同一个或其他控制滚轮（后方或前轮） 。 It'll take a little time to figure out which wheel is necessary for each item, unfortunately.它会花一点时间来计算出这轮是必要的每一个项目，很可惜。 Some use only the front, others use both.一些只使用方面，其他均使用两种。

Shown here with the big, beautiful Zeiss 24-70 f/2.8 zoom lens , the Sony A900 has a fitting, if high-dollar, mate.此处显示的与大，美丽的蔡司24-70镜头变焦镜头 ，索尼a900有一个恰当的，如果高美元，交配。 We shot extensively with this lens, and found it to be better than satisfactory, worthy of the A900.我们开枪，广泛与这个镜头，发现它能够更好地令人满意，值得的a900 。 It also balances out the A900's big body.它还结余出a900的大机构。 See our review of this $1,800 lens on SLRgear.com .看到我们的检讨这1,800元的镜头就slrgear.com 。

Now's a good time to point out that there is no pop-up flash on the Sony A900, due partly to the very large pentaprism inside.现在是一个很好的时间来指出，有没有弹出式闪光灯对索尼a900 ，部分原因是非常大的五棱镜内。 I think many of the Sony A900's intermediate owners will miss the convenience of a pop-up flash, as an external flash unit significantly raises the weight of an already large and heavy camera.我觉得很多的索尼a900的中间业主会怀念方便弹出式闪光灯，作为一个外部的Flash股显着提高的重量已经大型及重型相机。

The Mode dial on the left has only full Auto, Program, Aperture, Shutter, and Manual modes, plus three user-programmable Custom modes; there are no Scene modes.模式转盘就在左边只有全自动，程序，光圈，快门，手动模式，再加上3用户可编程的自定义模式;有没有场景模式。 To the right there's a new top status display, one that's very simple compared to most high-end digital SLR cameras.到右边有一个新的顶端状态显示，一说的很简单的比较，最高档的数码单反相机。 It displays only numbers, usually the shutter speed and aperture values, along with remaining frames available.它只能显示数字，通常快门速度和光圈值，随着余下的框架。

Some settings like ISO and EV are easily readable via the top Status LCD, but items like Drive and WB can be cryptic, so it's better to use the rear Status display.一些设置，如国际标准化组织和EV是易于阅读，透过顶端状态的LCD ，但项目一样，驱动器和世行可以潜，因此它的更好的使用后方状态显示器。 An illumination button just right of the LCD turns on an orange light, which Sony representatives jokingly insist is the same cinnabar orange that adorns the Alpha logo, lens ring, and other assorted accent areas. 1照明按钮恰恰好的液晶轮流上一亮黄灯，其中索尼的代表开玩笑地坚持是一样的朱砂橙认为， adorns阿尔法标志，镜头环，和其他各类口音的地区。 We'll let you decide.我们将让您决定。

The other four buttons on the top control Exposure Compensation, Drive mode, White balance, and ISO, working in concert with the rear control dial.其他四个按钮，顶端控制曝光补偿，驱动模式，白平衡，和ISO ，工作在音乐会与后方控制拨号。 While the front buttons for Exposure compensation and Drive mode are easy to press, we found the other two a little harder, comfortable with neither the thumb nor forefinger without removing your hand from the grip.而前面的按钮曝光补偿和驱动模式很容易的新闻，我们发现另外两个有点难度，舒适，无拇指食指也没有删除你的手从抓地力。

The Sony A900's rubber doors are the best-behaved doors we've seen on any camera, swinging open and staying put, rather than flapping shut when you let them go.索尼a900的橡胶门是最好的乖门，我们已经看到的任何相机，摆动开放和下榻的提出，而不是扑关闭时，你让他们走。 In clockwise order from the top left, they are Remote, HDMI, USB/Video out, and DC In.在顺时针方向，以便从左上方，他们是偏远， HDMI接口，有USB /视频输出，并在直流。

Sony A900 owners will have the option of using CompactFlash or Sony Memory Stick Pro Duo format.索尼a900的业主将有选择使用的CompactFlash或索尼的记忆棒格式。 Unfortunately, switching between cards is not automatic when one fills up, as is common on other dual-card digital cameras; still, you can access it on the rear Status display, which turns into an onscreen menu when you press the Fn (Function) button.不幸的是，之间切换卡是不是自动当一个人填满了，因为是共同对其他双卡数码相机;仍在，您是否可以访问它在后方的地位显示，这变成了一个屏幕上的菜单当您按下新生力量（功能）按钮。

SteadyShot INSIDE . steadyshot内 。 Sony says many experts thought adding sensor-shift image stabilization to a full-frame digital SLR would be impossible, but they managed to get it done nevertheless.索尼公司称，许多专家以为，加入传感器移图像稳定，以全画面的数码单反相机将是不可能的，但他们设法得到这样做不过。 They're moving a very large sensor at high speeds, so it is quite an achievement.他们正在移动一个非常大的传感器以很高的速度，因此它是一项相当的成就。 We haven't tested it in the SLRgear.com lab yet, but in casual shooting it seemed to work quite well.我们并没有测试它在slrgear.com劳顾会，但在休闲射击，似乎工作相当不错的。 Sony expects it offer from 2.5 to 4 stops of exposure latitude.索尼预计，它提供从2.5至4站暴露的纬度。

Though all of us like seeing the stabilizing effects of Canon and Nikon's optical image stabilization through the viewfinder, we also like the five-bar meter that appears in the optical viewfinder to tell you just how much the SteadyShot system has to work.虽然大家都一样，看到稳定的影响，佳能和尼康的光学图像稳定，通过取景器，我们也一样，五杆米中出现的光学取景器告诉你，刚才有多大steadyshot系统工作。

The same mechanism activates at startup and shutdown to shake dust from the sensor, and a new anti-static coating has been applied to the outermost glass to reduce the amount of dust that can stick to the sensor.同样的机制激活在开机和关机的动摇粉尘从传感器，以及一个新的防静电涂层已应用到最外层的玻璃，以减少金额尘埃，能够坚持到传感器。

Improved EV bracketing . 改进的EV包围 。 Recent Sony digital SLR cameras were limited to only two automatic bracketing settings: +/- 0.3 EV or +/- 0.7 EV.最近索尼数码单反相机的人仅限于两个自动包围设置： + / -0 .3的E V或+ / - 0. 7的E V 。 The Sony A900 allows a full spread of EV options, up to +/- 2.0 EV, a more useful spread.索尼a900允许充分蔓延的EV选项，直至+ / -2 .0E V增减，更有益的蔓延。

Interchangeable screens . 可互换的屏幕上 。 The Sony A900 comes with a Type G focusing screen, but two additional screens are available: Type M and Type L. Type M, called Super Spherical Acute Matte is superior for discriminating between in-focus and out-of-focus objects, but unfortunately it dims the view somewhat, enough that it's only usable with lenses with maximum apertures of f/2.8 or more.索尼a900具有G型对焦屏，但另外两个屏幕，可用： M型和研究型M型，所谓的超急性球形磨砂是优越的歧视之间，在重点和失焦的物体，但很可惜它变暗的看法有点，足够它的唯一可用的与镜头的最大光圈为f/2.8或以上。 Type L is the same as the very bright Type G, but with a grid for alignment or applying the rule of thirds. L型是一样，非常光明的G型，但与网格对齐或运用法治的三分之二。 As with other digital SLRs that have interchangeable screens, the user has to set the type of screen in Settings menu 3.作为与其他数码单反相机有可互换的屏幕上，用户已经设置的类型在屏幕上设置菜单3 。

Sensor . 传感器 。 Sony's Exmor CMOS sensor is what gives the Sony A900 its magic.索尼的exmor的CMOS图像传感器，是什么让索尼a900其魔术。 Above you can see how the A900's size compares to the Sony APS-C-sized sensor.以上你可以看到如何a900的大小比较索尼旱厕- C的大小的传感器。 Its pixels are actually larger than the Sony A700's 10-megapixel sensor, which should make for greater ISO sensitivity.其像素其实是大于索尼Samsung ）的10万像素的传感器，其中应作出更大的国际标准化组织的敏感性。 The 24.6-megapixel sensor is more than just a sensor, however, as it includes the analog to digital (A/D) conversion circuitry right on board the chip.该24.6万像素的传感器是不止一个传感器，不过，由于它包括模拟到数字（ A / D ）转换电路的权利，船上的筹码。 Over 6,000 A/D converters work in parallel to convert the image data before electronic noise can take hold.超过6000 A / D转换器的工作，在并行转换的图像数据之前，电子噪音，可以采取搁置。 That makes for fast data acquisition too.这使得快速数据采集。

Processors . 处理器 。 From there, the dual Bionz processors take the large files and crank them through fast enough to allow up to five frames per second capture, even in RAW + JPEG capture.从那里，双bionz处理器采取大型文件和曲柄他们通过不够快，以便允许将多达5每秒捕获，即使在以RAW + JPEG格式捕获。

Power like that also allows for sophisticated functions like Peripheral Illumination correction, which fixes vignetting problems in many situations.权力一样，还允许进行复杂的功能一样，周边的照明校正，修复渐晕的问题，在许多情况下。

AF system . 自动对焦系统 。 The Sony A900 has a new autofocus system with nine primary autofocus points, and ten supplemental AF points.索尼a900有一个新的自动对焦系统，与九小学自动点， 10点自动对焦的补充。 The user can select the nine AF points, but the ten additional points are used by the system to enhance the performance of the others when the Sony A900 is set to wide-area AF mode.用户可以选择9点自动对焦，但额外的10点所用的系统，以提高性能的其他人时，索尼a900是设定为大面积自动对焦模式。 A larger sensor in the center of the frame switches on when lenses of f/2.8 or larger are attached, allowing the system to take advantage of the larger aperture.较大的传感器在中心框架开关时，镜头为f/2.8或更大的附加，使系统利用较大的光圈。

If you choose to use the Local AF mode, you can select from the nine AF points in the viewfinder with the joystick on the rear panel.如果您选择使用本地自动对焦模式，您可以选择从9点自动对焦在取景器与操纵杆就背面。 Choose Wide, and the Sony A900 will choose for you.选择广泛，和索尼a900会选择适合您。 Choose Spot and the Sony A900 uses the more accurate center AF point.现货选择和索尼a900使用更精确的自动对焦中心点。 See the Optics section for a more detailed discussion of the Sony A900's AF system.看到光学的第一个较为详细的讨论，索尼a900的自动对焦系统。

Lens compatibility . 镜头的兼容性 。 While the Sony A900 is compatible with the company's DT-series lenses, many of them, if not most, will vignette significantly with the full frame camera, since they were designed to deliver a smaller image circle to the company's APS-C format cameras.而索尼a900是与该公司的DT公司系列镜头，他们中的许多，即使不是大多数，会晕影显着，与全帧相机，因为它们的设计目的是提供一个较小的成像圈，以该公司的接入点- C的格式相机。 When a DT lens is mounted, the camera automatically captures an APS-C sized frame.当一个镜头是DT公司展开，相机会自动撷取一旱厕- C的大中型框架。 Only four thin brackets inside the viewfinder indicate where the cropping will occur; it does not gray-out as seen on the Nikon D3.只有4个薄括号内的取景器显示，那里的种植将会出现，它不会灰度作为上看到尼康的D3 。 Incidentally, you can choose to shoot an APS-C sized image when a full-frame lens is mounted in Settings menu 4.顺便一提，您可以选择拍一个接入点- C的大小的影像时，全画面的镜头是安装在设置菜单4 。 The image captured is 11 megapixels maximum in that mode.被俘的形象是11百万像素，最高可在该模式。

Storage and battery . 存储和电池 。 The Sony A900 uses CompactFlash and MemoryStick Pro Duo cards, and the battery pack is the now-standard InfoLITHIUM NP-FM500H, a 7.2V 11.8Wh lithium-ion design.索尼a900使用CompactFlash和memorystick PRO Duo卡，和电池匣是现在标准infolithium的NP - fm500h ，氢11.8wh锂离子设计。

An optional battery grip is available for the Sony A900, the Sony VG-C90AM, which is light in weight, but increases the height of the overall camera to exceed the height of the Canon 1D-series and Nikon D3.可选电池抓地力是可用于索尼a900 ，索尼vg - c90am ，这是重量轻，但增加的高度，整体相机超过高度佳能1系列和尼康的D3 。

Still, the battery grip has a few interesting features, including the full array of buttons on the rear that duplicate the controls accessible by the right hand on the camera itself.还有，电池抓地力有几个有趣的功能，包括完整的阵列按钮，后方认为，重复管制出入，右手就相机本身。 The Sony Alpha system also uniquely has the unusual second shutter release location that is positioned slightly down from the right corner of the grip, which changes the balance dynamic of the camera.索尼阿尔法系统也非常有不寻常的第二次快门释放的位置，定位略有下降，从右上角的抓地力，改变了平衡，动态的相机。 It puts the lens in the same plane with the shutter whether you shoot vertically or horizontally, and does distribute the weight more evenly in both hands if you keep the camera upright and use a lighter lens.它把镜头在同一平面与快门你是否拍摄纵向或横向联合，并分发的重量更均匀地在两手如果您保留相机正派和使用较轻的镜头。 The downside is that with a heavy lens, like the Sony 24-70mm f/2.8, most of that weight rests in your left hand.坏处是怀着沉重的镜头，如索尼24 - 70毫米镜头，大部分认为，重量落在在您的左手。

Physical Comparisons 身体比较

Sony A900 vs Canon EOS 1Ds Mark III索尼a900与佳能EOS 1ds马克三

Sony A900 vs Canon EOS 5D索尼a900与佳能EOS 5

Sony A900 vs Canon Rebel XSi索尼a900与佳能叛军将xsi

Using the Sony A900使用索尼a900

Though the Sony A900 is large and heavy with the Carl Zeiss 24-70mm f/2.8 mounted, I quickly came to accept that burden and just enjoyed shooting with the camera.虽然索尼a900是大型及重型与卡尔蔡司24 - 70毫米镜头展开，我很快接受的负担，和刚才所享有的拍摄与摄像头。 It's a little like moving from driving a nice car to driving a big truck.这是一个有点象从驾驶好车驾驶大卡车。 Handling is different, somewhat unfamiliar at first, even a little ungainly, but soon you're tooling along like you've been driving a big truck for years.处理是不同的，有点陌生，在第一，即使有点ungainly ，但很快您的模具一直想你已经驾驶的大卡车年。

The big Carl Zeiss optic is beautiful, and both looks and feels terribly precise.大卡尔蔡司光学是美丽的，都期待和感到可怕的精确。 Focus and zoom rings are tight and smooth.重点和变焦环的紧张和平稳。 Even the metal and plastic lens shade is perfection.即使是金属和塑料透镜遮荫，是完善。 It mounts to the machined bayonet slot tighter than a piston ring and snaps briskly into place.它安装到加工刺刀插槽严格的比活塞环卡轻快到位。

Its bulkiness almost makes the Sony A900 look a little more primitive, like some kind of early digital SLR design, or else a film camera from an earlier era.其bulkiness几乎使索尼a900看些原始的，像一些种早期数码单镜反光设计，否则，一胶卷相机从早期的时代。 It certainly looks different from other cameras on the market, to be sure.可以肯定的期待不同于其他相机的市场，可以肯定的。

That big optical viewfinder is wonderful, and it does indeed seem to show 100 percent of the frame, to my surprise.大光学取景器是美妙，和它确实似乎表明， 100 ％的范围内，我感到惊讶。 Sometimes it was an unwelcome surprise, because I'm used to framing with tighter, less accurate viewfinders.有时，这是一个不受欢迎的奇怪，因为我用来制定更严格的，精确度较差取景。 Often when I thought I'd get away without stepping back to include just a little more of the subject's boundaries in a tight shot, I found that the Sony A900 was instead quite faithful to what I saw in the viewfinder.往往当我以为我要摆脱没有加强回仅包含多一点的题目的界限，在严格开枪，我发现，索尼a900是不是很忠实于我所看到的在取景器。 Gone was the slop I had come to count on from other digital SLRs, whose viewfinders seldom show more than 95 percent of the frame.经历是边坡我曾来计数就从其他数码单反相机，其取景器，很少显示，百分之九十五以上的框架。

Controls . 管制 。 Most controls are well-placed, and the dials and wheels have the appropriate resistance.大多数管制是良好的位置，和转盘和车轮有适当的阻力。 They're not too firm and not too light, and they don't feel cheap.它们不是太坚定，而不是太轻，他们不觉得便宜。 The mode dial is also quite firm, locking into position well.模式转盘也相当坚定，锁定位置。 Though I seldom expect much from joystick controls, the Sony A900's joystick is just right.虽然我很少期望从操纵杆控制，索尼a900的操纵杆恰恰好。 You can toggle in four directions, and press down to activate many controls.您可以切换，在4个方向，并按下激活许多控制。 It's especially useful for moving the focus point around in a hurry, as well as for navigating the Function menu.它的特别有用提出的聚焦点左右，在急急忙忙，以及为航行的功能菜单。

Two controls are not perfectly placed, though. 2管制是不是优越位置，虽然。 One is the Function button itself.一个是功能按钮本身。 It's a long reach from the joystick to the button, making the onscreen menu more difficult to use than it should be.这是一个漫长的达到从操纵杆到该按钮，使屏幕上的菜单更难以使用，比它应该的。 Also vexing is how after making a change to a menu item, you're not returned to the Function menu display to make another selection; instead you're dropped back into the Status display.也令人苦恼的是如何决策后，改变了菜单项，您没有恢复到功能菜单显示再作选择;不是您回落到状态显示器。 If you want to change more than one item, you'll have to make that reach to the Fn button again.如果您想改变一个以上的项目，您将有使达到新生力量按钮。

The other occasional problem control is the Depth-of-field preview button, which I have set to serve as the Intelligent Preview button.其他偶尔的问题，控制是景深预览按钮，我已充当智能预览按钮。 I too frequently press this button when shifting the heavy A900 from hand to hand, or while turning it to shoot in vertical format.我也经常按下此按键时，把沉重的a900手的手，或把它拍在垂直格式。 Intelligent preview exposures take a few seconds to expose and appear, meaning that the camera is occupied for those seconds; more dangerous is that the camera will continue to display the image for some time, waiting for input, thus draining the battery without my knowledge.智能预览风险采取了几秒钟，以揭露和出现的，也就是说，相机是被占领的那些秒;更危险的是，该相机将继续展示形象，一段时间后，等待输入，从而耗尽电池没有我的知识。

Intelligent preview . 智能预览 。 Sony's innovative use of a limited RAW file to create the A900's Intelligent preview is useful in a number of ways.索尼的创新使用有限的RAW文件创建a900的智能预览是有用的在若干方面。 Though it's meant to be used to subtly tweak a sample image before making the real exposure, I found myself using it more often as a substitute for Live View mode when I couldn't get my eye to the viewfinder.虽然它的意思是被用来巧妙调整样本的形象，才作出实质接触，我发现自己使用它更经常地作为替代活视图模式时，我不能让我的眼睛来取景。 I just pressed the Depth-of-field button to make sample exposure after sample exposure until it was framed just right, then pressed the shutter release.我只是按下景深按钮，使样品暴露后，样本曝光，直到它被诬陷恰恰好，然后按下快门释放。 Intelligent preview is really better used for tripod work, where your framing is already set.智能预览，实在是更好地用于三脚架的工作，您的诬陷，是已经成立。 It's designed to let you pick just the right white balance, exposure compensation, or DRO mode.它的设计让你拿起刚才的权利，白平衡，曝光补偿，或牙医注册条例模式。 If you're in Aperture priority mode, you can also adjust your aperture -- though you won't see a depth-of-field change; it's not that good.如果您在光圈优先模式，您也可以调整您的光圈-虽然你不会看到一个景深的变化;这并不是说好的。 Similarly, you can adjust Shutter speed if in Shutter priority mode.同样，您可以调整快门速度，如果在快门优先模式。 Of course in Manual mode, you can adjust everything.当然在手动模式下，您可以随时调整的一切。 Intelligent preview is pretty useful.智能预览是相当有用的。

Many Sony A900 users will wonder why they can't just save the image they've tweaked, rather than take another exposure.许多索尼a900的用户将不知道为什么他们不能只保存图像，他们已经扭曲，而不是采取另一种接触。 The simple answer is that the A900 only captures a very limited-resolution RAW file to make quick, on-camera processing easier, thus delivering an adjusted image to the LCD as fast as you need it.答案很简单，就是认为a900只捕捉非常有限的分辨率RAW文件，使快速，对相机的处理更容易，从而提供了一个调整的形象展现给液晶显示器一样快，你需要它。 If you accidentally captured that perfect smile when you pressed the Intelligent preview button, though, you'll just have to say goodbye to perfection and try again.如果您不小心被俘完美微笑，当您按下智能预览按钮，虽然，您刚才已经说再见的完善，然后再试一次。

Shooting . 射击 。 Despite its size, the Sony A900 is really fun to shoot.尽管其规模，索尼a900 ，实在是有趣的拍摄。 The big viewfinder makes looking around in your potential image more like detail work than a rough framing job, as it is with most digital SLRs.大取景器，使环顾在您的潜在的形象，更想详细的工作，比一个粗略的制定工作，因为它是与大多数数码单反相机。 You can carefully consider what's in focus, and select another focus point by moving the joystick (provided you've chosen to use Local AF area mode) to another position.您可以仔细考虑什么的，在重点，并选择另一个聚焦点移动操纵杆（提供您选择使用本地自动对焦区域模式）到另一个位置。 As with the Canon 5D, the diamond-shaped AF array is small for the overall viewfinder area, which isn't as good for portrait compositions as you'll find in the A700 or Canon 40D, for example, as it's harder to get an AF point close to one of the subject's eyes in a head-and-shoulders shot.作为与佳能5 ，钻石形自动对焦阵列是很小的整体取景器方面，这是不作为，为良好的肖像组成，作为你会发现，在Samsung ）或佳能40 D条，举例来说，由于它的努力得到一自动对焦点，接近一个主题的眼睛在头部和肩膀开枪。

The shutter sound tells of a very large mirror, one moving as fast as its large size will allow.该快门声音讲述了一个非常大的一面镜子，一动一样快，其大尺寸将允许。 We're told that the mirror is extra large not just for the full frame, but also to deliver that 100% viewfinder area.我们正在说，照镜子，是特大型不仅为全帧，而且还提供100 ％的取景面积。

The mirror lifts, rather than flips up.照镜子，升降机，而非翻转。 It's a pretty cool compromise, necessary to accommodate the large SteadyShot engine, we're told, while still allowing that large mirror.这是一个很酷的妥协，必要的，以容纳大型steadyshot引擎，我们正在告诉，同时仍然允许这一面大镜子。 The sound is just a simple click-click, with no winding sound, so it feels nostalgic and does the job without a lot of fanfare.声音只是一个简单的按一下点击，没有健全的清盘，所以觉得怀旧和是否就业，没有大量的大张旗鼓。 Viewfinder blackout time is supposed to be improved, but it's still a little slower than I like.取景器停电的时间是有待改善，但仍然有点慢，我喜欢。 Again, it's a big mirror.再次，这是个很大的一面镜子。

The Sony A900 is also able to shoot up to five frames per second, quite a feat for a 24.6-megapixel camera with a full-frame sensor.索尼a900还能够拍摄长达五年每秒，有不少的壮举为24.6万像素的相机与全帧传感器。 Its 1/8,000 second shutter speed makes it an impressive action camera, rivaling its more expensive high-res competition, the Canon EOS 1Ds Mark III, which also captures five frames per second.它的1 / 8000秒快门速度，使它成为令人印象深刻的行动相机，堪舆其较昂贵的高解析度的竞争，佳能EOS 1ds马克第三，这也捕获5帧每秒。 The shutter mechanism is rated for 100,000 cycles.快门机制是额定100000周期。

Checking . 检查 。 Seeing whether you got the shot after capture is key, and of course the Sony A900's high-res 3-inch LCD really helps on that score.看你是否得到了开枪后，捕捉是关键，当然，索尼a900的高解析度3英寸液晶真的有助于就这一评分。 You always have to be careful with transflective displays, however, especially in sunlight.你总是要小心与透显示器，不过，特别是在阳光下。 This can be complicated by using DRO modes, which, combined with the transflective display's metallic look, can make you think a shot is washed out more than it is.这可以通过使用复杂的牙医注册条例模式，其中，再加上与透显示器的金属外观，可以使你觉得一个镜头是水洗多，这是。 You can get used to this, and adjust accordingly, as I have, but checking the histogram is also a good habit, as is taking a few extra shots or shooting RAW when the work is critical.你可以使用这个问题，作出相应调整，正如我刚才，但检查直方图也是一个良好的习惯，由于是采取了一些额外的拍摄或拍摄时，原工作是至关重要的。

Touching the Custom button (marked with a C) toggles on the Histogram screen, along with most of the exposure data.在谈到自定义按钮（标有三）切换对直方图屏幕上，随着大部分的接触数据。 You get not just a luminance histogram, but red, green, and blue as well to help you gauge color casts.您不仅是一个亮度直方图，但红，绿，蓝，以及为了帮助您了解彩色演员。

You can zoom in by pressing the AF/MF button and turning the rear command dial.您可以变焦在按下自动对焦/中频按钮，并把后方指挥拨号。 Zoom level starts at 1.2x and goes to 19x.缩放级别始于1.2倍和去19x 。

One disadvantage to the Playback system on a 24.6-megapixel camera is that it's very slow to bring an image up, especially if it's still writing to the card.一不利的播放系统， 24.6万像素摄像头是它的非常缓慢，使一个形象，特别是如果它还是以书面形式向卡。 I've pressed the Playback button a second time, and then a third, only to have the image finally flash to the screen after three seconds, then disappear for another two seconds, then reappear.我已经按下播放按钮， 1秒的时间，然后第三个，只有有闪光的形象，最后到屏幕上后，三秒，然后消失，另一两秒钟，然后重新出现。 Sometimes it gets even worse before I remember to just wait five or six seconds to see where the camera is in the cycle.有时它得到更坏之前，我记得只是等待5或6秒，看到相机是在循环。

Once images are saved to the card, flipping between them is easy, and very fast.一旦图像保存到卡，翻开它们之间很容易，非常快。 Just don't get stuck in Index mode, activated with the Display button.只是不碰到困难，在指数模式，激活显示按钮。 It takes some time to bring up those five thumbnails across the top.它需要一些时间，使那些五缩略图全国首位。 It's convenient if you have time, but not if you don't.它的方便，如果您有时间，但不是如果你不。

The function of the front and rear control dials varies from menu to menu, which can often leave you spinning the dial in vain waiting for something to happen.该功能的前方和后方，控制转盘不同的菜单，菜单上，这往往能为您留下纺纱拨号，妄图等待某件事情出现。 Sometimes it's one dial, sometimes it's the other, and sometimes it's both.有时它的一拨号，有时是其他的，有时它的两个。 In cases where only one dial controls a given function, it would make more sense for Sony to allow both dials to control the function.的情况下，只有一个拨号控制某一特定的功能，它将使更多的意义上，索尼，让双方的转盘控制功能。

Size has a price . 大小有一个价格 。 There are those who go for the biggest and the best, and they're likely to slap down their largest credit card on the Sony A900 for 24.6 million little reasons.有那些谁去最大和最好的，他们很可能打了他们最大的信用卡上，索尼a900为24600000不大的原因。 But while they're at it, I suggest they check their computer hardware and either upgrade or at least invest in redundant, multi-terabyte disks, because the Sony A900's files are huge .不过，虽然他们正处于它，我建议他们检查他们的计算机硬件和升级，或至少投资于多余的，多TB的磁盘，由于索尼a900的文件通常都很大 。 A typical outing for me is filling a 4GB card in a hot hurry.一个典型的旅行对我来说是填补了4 GB的卡在一个热点匆匆。 Some of that's shooting RAW, some of it is just the JPEGs I shoot, which average from 7 to 18MB each.有的认为，射击原料，其中一些是刚刚JPEG图像i射击，平均7日至18mb每个。 Yes, I said 18MB.是的，我说， 18mb 。

Thankfully, Sony at least planned for the larger files and created a USB download pathway that is probably the fastest we've ever tested, moving 12,928KBytes per second.值得庆幸的是，索尼，至少计划在较大的档案，并建立了一个USB下载途径可能是最快的，我们测试过的，移动12928kbytes每秒。 Still, when you take as many test shots as we do, it's a huge ordeal to move all these images around.还有，当你需要很多的测试杆，作为我们做什么，这是一个巨大的磨难，移动所有这些图像左右。 The sample photos we've posted total almost 4GB of data.样本照片，我们已张贴总额几乎4GB的数据。

Sony A900 Image Quality索尼a900的图像质量

I shot the Sony A900 for about two weeks, and some of that time I shot the Canon 1Ds Mark III, it's only resolution rival in this format, alongside. i开枪，索尼a900为两个星期左右，和一些当时，我击落了佳能1ds马克第三，它的唯一的决议的竞争对手在这方面的格式，除了。 I don't need to tell those who've used a heavy pro camera what an investment that is in time and exertion.我不需要告诉那些谁使用过沉重的亲相机什么投资，是在时间和消耗。 But I love cameras, so I'm not complaining.但我爱相机，因此我并不抱怨。

Before I continue my simple analysis, which is bolstered by the other, more in-depth tabs to this review, remember that the Sony A900 is a $3,000 digital SLR intended for both pros and enthusiasts, while the Canon 1Ds Mark III is an $8,000 camera really only meant for pros.之前，我继续我的简单的分析，这是带动其他，更深入的标签，这项检讨工作，请记住，索尼a900是一个3000美元的数码相机为有利有弊爱好者，而佳能1ds马克三是8000美元相机真的只意味着为的利弊。

First, the Sony A900's image quality is truly awe-inspiring.首先，索尼a900的图像质量是真正惊人的感召力。 Opening a file in Photoshop and hitting Command + to get to 100% reminds me of that scene in Blade Runner when Deckard uses the Esper photoanalysis machine.开放的档案在Photoshop和命中指挥+让100 ％ ，令我想起这场景在转轮叶片时， deckard使用esper photoanalysis机。 If you know the film, you'll remember that he finds tremendous detail in the print photograph from the year 2019: "Enhance 57 to 19. Track 45 left. Stop. Enhance 15 to 23. Give me a hard copy right there."如果您知道电影，您会记得，他发现了巨大的，详列于打印照片，从今年到2019年： “提高57至19日。跟踪45左。停止。提高15日至23日。给我一个硬拷贝的权利，有” 。 In the end, he's found a reflection in the mirror that gives him an important clue.在年底，他的发现反映了在镜子里，让他了重要线索。

While I'm not doing my searching via voice command (that old technology that didn't take hold for most), it takes six enlargements to make it from 12.5 percent in portrait orientation to the 100 percent I need to check focus.虽然我不是做我的搜索通过语音命令（即旧的技术没有把握，为最） ，需时六放大，使其从12.5 ％ ，在纵向，以100 ％的，我需要检查的重点。 The image is 4,032 x 6,048, for goodness sake.形象是4032 x 6048 ，为善清酒。

Most astonishing was to take a 24mm wide-angle photo of the World of Coke in Atlanta from across a large field and be able to almost recognize faces standing near the building.最令人惊讶的是采取一种镜头24mm广角的照片，世界焦炭在亚特兰大来自全国各地的一大视场，并能够认识到所面临的几乎站立大楼附近。 You'd actually be able to recognize them, I'm convinced, had I not focused on the buildings in the background.您其实可以承认他们，我确信，如果我不着重于建筑物的背景。 And look at the detail in those buildings!并期待在详细在这些建筑物！ Take anything to 100 percent, and it doesn't seem like a big deal, of course, but start dragging around in the frame once you're there, and you start to appreciate just how much the Sony A900 has captured.采取任何提高到100 ％ ，它似乎并不像一个大不了的，当然，但开始拖曳左右，在框架一旦您在那里，你开始明白，只是多少的索尼a900已被俘。

Now let's compare the Sony A900 to the Canon 1Ds Mark III.现在的比较，索尼a900 ，以佳能1ds马克三。 I shot both with a Sigma 70mm f/2.8, the lab lenses we use for SLRgear.com testing to get more reliable results. i枪杀都与西格玛70毫米镜头，劳顾会的镜头，我们使用的slrgear.com测试，以获得更可靠的结果。 In terms of JPEG shots, the Sony produces larger images that are sharper, especially with the defaults from both cameras, but if you bring both to 100 percent and move around in the images, you'll find they're nearly the same.在条款的JPEG拍摄，索尼产生较大的图片是尖锐，尤其是与预设值，从相机，但如果你使双方达到100 ％和走动，在图像，你会发现他们几乎相同。 After all, it's only 3.5 million pixels between the two, and when you get out to 21 megapixels, adding a few more doesn't have that large of an effect.毕竟，它的，只有3.5万像素的两国之间，以及何时，你才能走出至21日在百万像素，加入了数没有大的影响。 Detail is detail, though, and the Sony does appear to give you more at low ISOs.详细是详细，虽然和索尼似乎给你更多的低国际团结。 Some of the difference in the images below is in the sharpness, heavily dependent on the default sharpening, and the presence of luminance and red channel noise from the Sony A900, where the Canon 1Ds Mark III does a little better with those artifacts.一些差异，在下面的图片是在尖锐，严重依赖于默认锐化，和在场的亮度和红色通道噪音从索尼a900 ，而佳能1ds马克三，是否有点更好地与那些文物。

Here are a few samples to get you started, but be sure to explore the full test results on the other tabs, where we go into much greater depth.这里有一些样本，让您可以开始使用，但一定要探索充分的测试结果对其他标签，我们在那里进入更大的深度。

Sony A900 Detail vs Canon 1Ds Mark III索尼a900详细与佳能1ds马克三

The top three images are cropped from a single Sony A900 image, the bottom are from the Canon 1Ds Mark III (note that the sensor in our Mark III is tilted noticeably).前三名的图像出现了从单一的索尼a900的形象，底部是由佳能1ds马克三（请注意，该传感器在我们的马克三是倾斜明显） 。 Both shots are with a Sigma 70mm f/2.8.这两个镜头与西格玛70毫米镜头。 Note that the size of elements is larger due to the higher pixel count from the Sony A900.请注意，规模较大的要素是由于更高像素计数从索尼a900 。 You can see a little more detail in the brick from the Sony images, and the grass is a bit sharper.你可以看到一点更详细地砖从索尼图片和基层是一个有点尖锐。 Naturally you can get more detail from both cameras with RAW capture.当然你可以更详细地从相机与原始捕获。

Sony A900 High-contrast detail vs Canon 1Ds Mark III索尼a900高对比度详细与佳能1ds马克三

Here's another detail shot with a more high-contrast subject.这里的另一个详细拍摄一个更高对比度的主题。 You can see a little more texture in the rock from the Sony A900 image on top, and it appears that DRO is doing some work on the darker parts of the stone.你可以看到多一点的纹理在岩石从索尼a900的形象，再加上，看来牙医注册条例，是做了一些工作，对黑暗部分的石头。 Both have pretty strong detail at f/8, though.都有很强劲的详细/八，虽然。

Sony A900 ISO series vs Canon 1Ds Mark III索尼a900的ISO系列与佳能1ds马克三

Lest you think the Sony A900 has completely bested the 1DS Mark III, here is a series from ISO 200 to 800 from both cameras, with the Sony at the top.否则，你认为索尼a900已完全bested该1ds马克三，这里是一系列从相当于ISO 200至800名来自相机，与索尼在最上方。 You can see that the Sony loses a little more detail as it moves into ISO 800 than the Canon does.你可以看到，索尼失去了一点更详细的，因为它进入的ISO 800比佳能是否。 And remember, the Canon's lowest "approved" ISO setting is ISO 100.请记住，佳能最低的“批准” ISO设置是ISO 100 。 Still, considering the resolution, we're really pixel-peeping here, but that's the only way to compare two very high quality cameras like these.但是，考虑到该决议，我们正真的像素偷窥在这里，但的唯一途径，要比较两个质量非常高，这些相机一样。 To see how both cameras perform at higher ISOs, see our High ISO NR page.看到双方如何履行相机在更高的国际团结，请参阅我们高的ISO二○ ○页。

Analysis . 分析 。 Does the superior resolution of the A900 overcome some of the noise issues we see?请问上级决议的a900克服一些噪音问题，我们看到？ Yes and no, but what makes a bigger difference is turning down the A900's sharpening all the way and sharpening later in Photoshop, where you have greater control, something the 1Ds's defaults are already tuned for.是和否，但更令更大的差异是转折下来， a900的激化，所有的途径和激化，后来在Photoshop中，如果你有更大的控制，一些该1ds的默认已经收看。 Of course, you can also shoot RAW and process those for greater quality from either camera.当然，您也可以在拍摄过程中原材料和那些获得更高的质量无论从相机。

We've done a more extensive analysis with comparison shots in the Exposure section, and delved deeper into the Sony A900's High ISO noise reduction versus that of the 1Ds under the sub-tab titled High ISO NR .我们已经做了更广泛的分析与比较，在拍摄暴露部分， delved深入到索尼a900的高的ISO降噪银两时表示，在该1ds下的子标签名为高的ISO二○ ○ 。 Overall, the 1Ds comes out on top with greater detail, but it's darn close.整体而言， 1ds出来，再加上与更详细，但它的石坝密切。

What's sure is that the Sony A900 is a fit rival for Canon's best camera, which costs $5,000 more.有什么肯定的是，索尼a900是一名适合的竞争对手为佳能的最佳相机，成本5000元以上。 I had a great time shooting with the camera, and almost as fun looking at the images afterward.我有一个伟大的时间，拍摄与相机，和几乎一样的乐趣看图片之后。 The Sony A900 is the current resolution leader in 35mm-equivalent digital SLR cameras, and it doesn't look like that's going to change soon.索尼a900是目前的决议领导人在35毫米当量的数码单反相机，它并不像认为的要尽快改变。 We'll have to see whether the competition has anything else up its sleeve to beat this.我们将要看看是否有什么竞争，否则其袖击败这一点。 As the last set of pictures above shows, it's not all about resolution, but high ISO performance is a very important factor as well.作为最后一组照片，上面显示，它的，并非所有有关决议，但高的ISO表现是一个非常重要的因素，以及。

What will be interesting is seeing the photos people will be able to make with such a high resolution digital camera.会是怎样有趣的是，看到照片的人将能作出这样的一个高分辨率的数码相机。

As I've said of other Sony digital SLRs, what's nice about them is that they're relatively easy to use, and simple to learn as well.正如我已经说过其他索尼数码单反相机，有什么好对他们的是，他们正在比较容易使用，以及进行简单的了解，以及。 A well designed menu system, along with the Quick Navi screen make tweaking settings fast and clear, and now the new Intelligent Preview mode makes short work of complicated shots, making it a little easier to pay attention to the small details as you set up a shot.精心设计的菜单系统，随着快速导航屏幕上作出调整，设置快速和明确的，现在新的智能预览模式，使短期的工作，复杂的镜头，使得它变得更轻松要注意小细节，正如你成立一个枪杀。

Shooting with the Sony Alpha A900 can be summed up in one word: Satisfying .射击与索尼阿尔法a900可以归纳在一个字： 满意 。

Not sure which SLR lens to buy? 不知道这单镜反光相机镜头买？ Visit SLRgear.com for 访问slrgear.com为 camera lens reviews, tests, specs & prices , 镜头评语，测试，规格和价格 ， including Sony lenses ! 其中包括索尼的镜头 ！

Sony A900 Conclusion索尼a900结论

Pro:亲：

Con:弊：

Extraordinary resolution, nothing touches it at its price point不平凡的决议，没有涉及在其价格点 Built-in SteadyShot image stabilization内置在steadyshot图像稳定 Surprisingly fast, given the amount of data the camera is pushing around令人惊讶的快，由于数据量相机是推动左右 Good color rendering: Natural without seeming flat良好的显色性：自然似乎没有单位 A lot of nice user interface touches, well thought out controls很多好人的用户界面触及，深思熟虑的管制 Intelligent Preview feature is a real time-saver for determining best camera settings智能的预览功能，是一个真正的节省时间的确定最佳的相机设置 +/- 2 EV steps on auto bracketing is nice for HDR (High Dynamic Range) shooters + / -2 E V步就自动包围很高兴，为人类发展报告（高动态范围）射击 Sony finally made their RAW files be truly RAW!索尼终于有了自己的RAW文件才能真正原料！ (Able to turn off high-ISO noise reduction in the RAW files) （可以关闭高的ISO降噪，在RAW文件） True 100% pentaprism viewfinder真正的100 ％ ，五棱镜取景器 Huge viewfinder image, really hearkens back to the days of film SLRs (in a good way)巨大的取景器的形象，真正hearkens回的日子，电影单反相机（在一个很好的方法） User interchangeable focusing screens用户可以互换的重点放在屏幕 Lighter than the only other full-frame in its resolution class (Canon EOS-1Ds Mark III)更轻，只有比其他全帧在其第级（佳能EOS - 1ds马克三） Rugged magnesium alloy body凹凸不平的镁合金机构 3.0-inch, high-resolution LCD 3.0英寸，高解析度的液晶显示器 Top panel LCD (albeit a small one)顶端面板LCD （尽管是一个小一） Dramatically low price for a full-frame camera with this much resolution显着低廉的价格为全画面的相机与这么多的决议 HDMI output HDMI输出 Good battery life良好的电池寿命 Dual memory card formats双存储卡格式

Some image noise even at ISO 200一些图像噪声，甚至在ISO 200 At anything above ISO 200, noise limits maximum print size before resolution becomes an issue.在任何上述ISO 200之间，噪音限制的最高打印尺寸的决议之前，成为一个问题。 High-ISO performance doesn't match that of Canon EOS-1Ds Mark III (Which is also 2.6x as expensive though)高的ISO表现不相符的佳能EOS - 1ds马克三（这也是2.6x作为昂贵的，虽然） Dynamic range less than that of many current models动态范围较许多现有机型 Noticeable delay when switching from record to playback mode is annoying明显的延迟切换时，从记录，回放模式是烦人 Despite being much lighter than its's only competitor, still a big, heavy hunk of metal and glass (not the camera's fault, just a fact of life with full-frame.)尽管受到很多打火机比其唯一的竞争对手，仍然是一个大，重型hunk金属和玻璃（而不是相机的错，只是一个生活中的事实与全帧） 。 No built-in flash (not unusual for a pro model though)没有内置在Flash （并非不寻常一个亲模型虽然） APS-C mode does not improve burst speed旱厕- C的模式不改善水管爆裂，速度 Exposure accuracy may suffer with DT lenses in APS-C mode曝光的准确性可能遭受与DT公司的镜头在旱厕- C的模式 No Live View mode不会有活视图模式

Sony started the year promising a lot for their flagship camera.索尼公司今年开始前途了很多他们的旗舰相机。 We didn't have a name, nor a long list of features, but we did know that the sensor would be a 24.6-megapixel design that was expected to impress.我们没有一个名称，也不是一个长长的名单的功能，但我们也知道，传感器将是一个24.6万像素的设计，预期留下深刻的印象。 It certainly has done that.当然这样做。

The Sony A900 is a formidable camera.索尼a900是一项艰巨的相机。 It's big, which won't work for everyone, but I found it more than bearable with my medium-sized hands, and even my daughter had no trouble hefting the A900 with the 24-70mm f/2.8 attached and firing off a few frames.它的大，这将是行不通的，为大家，但我发现它比我承受的中型手，甚至我的女儿没有麻烦hefting该a900与24 - 70毫米镜头的重视和发射了数帧。

If you want the most pixels in a small package, the Sony A900 is where you'll find it.如果您想要最像素，在小型包装中，索尼a900是在这里您可以找到它。 It's bulky, but less so than the more expensive 1Ds Mark III, and that makes it easier to bring along.它的体积大，但较少，所以比较昂贵的1ds马克三，这使得它更容易带动。 I enjoyed shooting with the 24-70mm f/2.8 Carl Zeiss so much that I recommend it if you can afford it.我很喜欢拍摄与24 - 70毫米镜头卡尔蔡司这么多，我建议的话，您可以负担得起。 I recently attached the 18-70mm kit lens that comes with the A200, and the A900 felt quite a bit more bearable, though I can only imagine that high-res sensor would reveal all the flaws in that less-expensive lens.最近，我重视的18 -7 0毫米，包镜头来与a 200，以及a 900感到很多一点忍受的，虽然我只能想象高分辨率传感器会显示所有的缺陷，在这不太昂贵的镜头。

Image quality is Sony's best so far; not just in terms of resolution, but also in controlling their impulse to squelch all noise at the expense of detail.图像质量是索尼公司的最佳至今;不只是在条款的决议，而且在控制他们的冲动压制所有的噪音而不惜牺牲的详细资料。 You can even turn off the high-ISO noise suppression that was once inaccessible.你甚至可以关闭高的ISO噪声抑制，这是一次无法访问。

Not only is the viewfinder so big and beautiful that you think you might fall in, the image quality has the same effect when you view the images on your computer.不仅是取景这么多美丽的说，您认为您可能在秋天，图像质量，具有相同的效果当您查看图像在您的计算机上。 With the ability to capture full frame images at a high clip, the Sony A900 is one impressive image maker, and a certain Dave's Pick .与能力，捕捉全帧图像在一个较高的剪辑，索尼a900是一个令人印象深刻的形象，制造商，和某戴夫的回升 。