Sporting what is claimed to be the highest resolution in its class, the a900 DSLR delivers ultra-fine, high image quality with its 24.6-megapixel, 35mm full-frame size “Exmor” CMOS sensor.
Click to enlarge
The a900’s 24.6 megapixel resolution delivers virtually noiseless images and allows wider angles and perspective only possible with a 35mm full frame size SLR.
Produced using proprietary Sony planarisation technologies to ensure an ultra-flat surface across the entire imaging area, it uses over 6000 on-chip column parallel analogue/digital converters to convert analogue signals to noise-resistant digital signals at the earliest possible stage. The ISO sensitivity ranges from 200-3200 in 1/3 EV steps (ISO 100-6400 can be set as an expanded range).
Also said to be a world’s first is the SteadyShot inside anti-shake system that is integrated into its body, achieving an anti-shake effect equivalent to shutter speeds faster by 2.5 to 4 stops with a larger and heavier image sensor. The body-integrated system delivers stabilisation even for wide, fixed-focus, large aperture lenses, which is usually difficult for a lens integrated system.
This sensor-shift, optical image stabilisation system works with all a series lenses, including wide, fixed focus and large aperture lenses.
To prevent dust particles from marring images captured, an anti-dust coating is applied on the low pass filter to prevent dust adherence. Also, an anti-dust mechanism vibrates the sensor at high speed every time the camera is switched off.
Equipped with two BIONZ image processing engines working parallel to process high pixel count image data with top level speed, the unit is customised to get the most out of the 24.6 megapixel sensor, especially when shooting continuously at five frames per second. Optimised for the a900 and working hand-in-hand with the image sensor, the dual BIONZ engines work to deliver natural colour reproduction, rich tones, as well as good image resolution with minimum noise.
The D-Range Optimiser (including an ‘Advanced’ mode that offers five optimisation levels for finer control) adjusts exposure and tone for a more natural-looking and balanced exposure, even for backlit shots.
The unit’s viewfinder is bright, clear and easy-to-see with minimal aberration thanks to the adoption of a condenser lens and highly refractive elements into its optics, delivering brightness with approximately 0.74x magnification and virtually no distortion. A user-replaceable, high-quality focusing screen is available in both L-type (grid pattern) and M-type (super spherical acute matte), both sold as optional accessories.
With PhotoTV HD, users can easily enjoy their photos in high definition on any compatible BRAVIA HDTV using an HDMI cable. The a900 is capable of recording images at either a 3:2 or widescreen 16:9 aspect ratio. The new Intelligent Preview function can also be used when the camera is connected to an HDTV.
Approximately 880 images can be taken on a single charge of the NP-FM500H InfoLithium battery. Dual memory card slots on the camera accept both Memory Stick Duo recording media and CompactFlash cards. UDMA cards are also supported. The Quick Navi information display allows users to switch between both slots quickly. In addition, the optional VG-C90AM vertical grip accepts two batteries and boasts the same rugged, yet lightweight, dust and moisture-resistant magnesium alloy construction as the a900 body.
A 3-inch type “Extra Fine” LCD with approximately 921k dot resolution gives photo quality on-the-spot viewing.
$4,499 (body only)