Sony Alpha DSLR-A900 – 24-Megapixel Pro DSLR

2008 Photokina News Sony Uncategorized

SONY UNVEILS FIRST FULL-FRAME ALPHA DSLR MODEL
SAN DIEGO, Sept. 9, 2008 – Sony is introducing its full-frame a (alpha) DSLR-A900 camera, aimed at serious photo enthusiasts looking for traditional SLR performance with the added benefits of digital photography.

It is designed to deliver ultra-fine picture quality with the world’s highest resolution, 24.6-megapixel, 35 mm full-frame CMOS sensor and fast image processing with a new dual BIONZ® processing engines. The camera is also the first to have a body-integrated image stabilization system for a full-frame sensor with Sony’s SteadyShot® Inside anti-shake system.

One look at the camera’s distinctive pentaprism and nostalgic body design will evoke its full-frame optical performance. It features a bright, clear optical viewfinder with 100% field of view coverage that would impress even film photography loyalists.

“The a (alpha) DSLR-A900 introduction solidifies Sony’s position as a leading camera manufacturer that can meet the demands of serious enthusiasts,” said Phil Lubell, director of digital camera marketing at Sony Electronics. “It represents the best in sensor and image processing technologies and offers enhanced functions, performance and reliability so photographers can push their creativity to the limit.”

Ultra-Fine Images As The Human Eye Perceives Them
The camera’s Exmor™ CMOS sensor delivers the photographic expressive power of wide angles and perspective that only a 35 mm full-frame sensor can offer, and is designed to take advantage of the resolving power of high-precision a (alpha) lenses. Its high pixel count and large size provide enhanced image detail and a wider dynamic range for natural color reproduction and subtle tonal gradations.

The sensor is produced using proprietary Sony planarization technologies to ensure an ultra-flat surface across the entire imaging area. Instead of a single analog/digital convertor, the sensor uses over 6,000 on-chip, column-parallel A/D converters to convert analog signals to noise-resistant digital signals at the earliest possible stage. The result is reduced noise and high-speed transfer of data.

Image processing gets a boost in speed and power from the application of two BIONZ image processing engines. Large amounts of data captured by the 24.6-megapixel sensor can be quickly processed to achieve a fast shooting response. Additionally, this dual BIONZ processing system applies advanced noise reduction algorithms producing images of exceptional quality and detail, especially at high ISO sensitivities.

World’s First Anti-Shake System for a Full-Frame Sensor
The camera’s newly-developed, body-integrated SteadyShot Inside unit achieves an anti-shake effect equivalent to shutter speeds faster by 2.5 to 4 stops. This new unit provides stabilization for Sony, Minolta and Konica-Minolta wide angle, large-aperture lenses, which is difficult for lens-integrated systems.

State-of-the Art Optical Performance and Responsiveness
The ultra-bright viewfinder with 100% field of view coverage and 0.74x magnification enables accurate framing and preview. It features a high-power condenser lens, an eyepiece with high reflective-index glass, and a multi-layer, anti-reflective coating on every optical surface to deliver its extraordinarily bright and accurate view.

Additionally, the focusing screen is user-replaceable, with additional L-type (grid pattern) and M-type (super spherical acute matte) screens sold separately.

The camera’s newly-developed autofocus system consists of nine wide-area sensors with 10 assist points for improved tracking of moving subjects. A center dual cross sensor comprised of two horizontal and two vertical line sensors as well as a dedicated f/2.8 sensor are included to achieve greater precision, especially when using fast-aperture lenses.

It also offers high-speed continuous shooting of 24.6 megapixel images at five frames per second. A newly-designed mirror box features a unique parallel-link mirror mechanism that moves on two horizontal axes to accommodate both 100% viewfinder coverage and the body-integrated image stabilization system without increasing the camera’s size. The mirror box also has a new moving magnet actuator, a high-powered coreless motor for a faster shutter charge, and a magnet catcher to minimize mirror bounce and light refraction within the box.

Versatility to Unleash Creative Possibilities
The model’s innovative intelligent preview function takes the guesswork out of setting up a shot and the hassle of taking multiple shots to achieve a desired effect.

After pressing the depth of field preview button, the camera “grabs” a RAW preview image which is processed and displayed on the LCD screen. You can then fine tune white balance, determine the best level and effect of dynamic range optimization, adjust exposure compensation and check histogram data, all before you actually take the picture. Preview images are not recorded on the camera’s memory card, thus saving capacity.

Other key features aimed to expand creative options include the Dynamic Range Optimizer (DRO) with five levels of user-selectable correction as well as DRO bracketing for enhanced scene analysis and graduation optimization. EV bracketing with ±2EV range makes it easy to create high dynamic range composite images.

Thirteen creative styles can be selected to enhance images and then fine-tuned by customizing contrast, sharpness, zone matching and other parameters, while 3 user-programmable memories provide instant access to as many as 26 different mode settings.

Powerful RAW file processing control is put in the photographer’s hands with the included Image Data Converter SR3 software that delivers faster file processing speeds, easy adjustment of image parameters, Dynamic Range Optimization and a new Peripheral Illumination function that compensates for corner light fall off.

With the camera’s HDMI output and Photo TV HD mode, your creative output can be enjoyed on a compatible HD television. This mode brings the look of actual printed photography to the television, by fine-tuning such image parameters as sharpness, gradation and color.

Comfort in Your Hands
Its construction features rugged, lightweight magnesium alloy with moisture-resistant, rubber seals for buttons and dials, an anti-static coating to prevent dust adherence to the imager, and a high-endurance shutter rated for more than 100,000 release cycles.

It has a 3-inch, Xtra Fine LCD screen (921K) makes it possible to check focus and image quality with accuracy. It incorporates an easy-to-see display with a quick navigation menu to easily access common functions without interrupting your creative flow. A backlit LCD panel sits on top of the camera and displays key settings.

System Expansion with New Accessories
The A900 camera will be accompanied with an array of accessories like the recently-announced Sony HVL-F58AM flash unit with its innovative Quick Shift Bounce system, powerful performance with a guide number of 58, and wireless auto flash ratio control.

The Sony® VG-C90AM vertical grip offers the same ease of operation when shooting vertically as horizontally, with its button layout and low-position shutter-release button. It also houses two InfoLITHIUM® batteries (sold separately) for longer shooting and playback.

The DSLR-A900 body will be available in November for about $3,000 along with related accessories. All will be available at authorized dealers, at military base exchanges, Sony Style retail stores (www.sonystyle.com/retail) and at sonystyle.com. Online pre-orders begin online on Sept. 10.

Sony Alpha DSLR-A900 Specs


Related Content:
Sony Digital SLR User Reviews
All Digital SLR User Reviews
Sony Cameras Forum
Digital SLR Forum
Sony Alpha Cameras Web Site

Sony Alpha DSLR-A900 - Front
Sony Alpha DSLR-A900 - Top
Sony Alpha DSLR-A900 - Internal metal chassis

next pageSony Alpha DSLR-A900 Specs >>

About the author: Photo-John

Photo-John, a.k.a. John Shafer, is the managing editor of PhotographyREVIEW.com and has been since the site launched back in 1999. He's an avid outdoor enthusiast and spends as much time as possible on his mountain bike, hiking or skiing in the mountains. He's been taking pictures for ever and ever, and never goes anywhere without a camera.


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  • Richard H says:

    Good but I like my excelent Nikon 35mm F2.0 on my D80

  • You would love Minolta’s 35mm f/1.4 AF on A900 too, or Minolta 50mm f/1.4 AF, or Minolta 28mm f/2.0AF too.

  • Cindy H says:

    Why no pic of the backside? I haven’t found a digital yet that I would be willing to set aside my Canon AT-1 35mm.
    I’ve tried some and I can’t stand a camera that tries to decide what I’m trying to capture in a shot! Nor do I like that they hesitate with the shutter when I’m tring to catch on object in mid-movement.
    I’d like to see hybred cameras(dig/35mm SLR, without all the bells and whistles), so a person can have the option of which medium they wish to work with.

  • Don R says:

    To the poster above: I’ve tried this Sony and it is the most film like experience I’ve had in the digital era. The viewfinder and whole feel of the camera is like a 35mm SLR, especially the shutter, and using it with the excellent prime lenses I tried it with was surprisingly reminiscent of my Canon FTb. Try one, you’ll be impressed!

  • See says:

    I tried the Sony A900 with the Zeiss Lens.
    Construction is Solid and The Grip feels like very secure and firm.
    Pictures are superb,never seen anything like this in Digital
    and the HDMI editing is simply Awesome.
    This is truly State of the Art photography.

    This is the one DSLR I been waitinmg for.
    I have to get one soon.

  • paul ferriggi says:

    i want to buy the SONY A 900

  • Denis says:

    i bought the A900, but was not aware that the DT series of lenses are not fully compatible with the camera. ie it crops the image and therefore u dont get the 24mb.

  • Photo-John says:

    Denis-
    Thanks for your comment on the Sony A900. Hopefully it will help someone else avoid making the same mistake. Right now we have multiple lens systems for APS-C, Four Thirds, and full frame digital SLRs. It can be confusing. Full frame (Sony Alpha A900, Canon E)S 5D Mark II, Nikon D700, etc.) cameras won’t use all the same lenses that the APS-C sensor cameras use.

    I hope you ended up being happy with your A900, in spite of the misunderstanding about the DT lenses. From everything I’ve heard, the A900 is an excellent digital SLR. I’ve been very impressed with what Sony has done with the line since the original A100 Alpha camera.

    Please share your experience with the camera by writing a review for us. Here’s a link to the Sony A900 user review page:

    Sony Alpha DSLR-A900 User Reviews >>

    Thanks again for commenting on this story and thanks in advance for your review!

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