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Sony announces firmware upgrade for A850 and A900 DSLRs

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Sony has announced a free firmware upgrade for the full-frame A900 and A850, improving AF responsiveness, increasing the EV shift range from ±3EV to ±5EV (for improved HDR photos) and enabling the shutter release without a lens attached for astrophotography. The upgrade will be available shortly.
Press release

SONY ANNOUNCES FIRMWARE UPGRADE FOR DSLR-A900/A850

Creative shooting enhancements for full-frame α cameras

A firmware upgrade that refines shooting responses and creative options for the α900 and α850 35mm full-frame DSLR cameras from Sony.

All new and existing customers are advised to install the upgrade, available to download from the ‘Support’ area of the Sony web site.

Autofocus is quicker and more responsive than ever, thanks to improved AF motor control and smarter distance detection of out-of-focus objects.

Creative options are extended by a broadened range of exposure value (EV) compensation settings, now increased from ±3EV to ±5EV. Selected compensation value is displayed in the navigation display on the main LCD screen of both cameras. This boosted EV compensation range gives extra headroom when composing extremely high- or low-key images.
Exposure bracketing range has also been increased from a maximum of 4.0EV (three shots at -2EV, 0EV, +2EV) to a maximum of 6.0EV (-3EV, 0EV, +3EV). This wider range gives added flexibility when capturing multiple frames at different exposure values – for example when acquiring images for the creation of powerful post-shooting HDR effects.

As a further refinement, a new menu option allows shutter release to be enabled, even when the camera body doesn’t detect an attached lens. It’s useful for specialist applications such as astrophotography when the camera is attached to a telescope.

The latest firmware upgrade by Sony for registered α900 and α850 DSLR customers is available free of charge from here.
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