Autofocus is faster and more responsive than ever on the Alpha 900 and Alpha 850 DSLRs thanks to a firmware upgrade, claims Sony.

Improved AF motor control and ?smarter distance detection of out-of-focus objects? are among the billed improvements.

Sony says it has also increased exposure compensation, from +/- 3EV to +/- 5EV, while maximum exposure bracketing has been boosted to a maximum of 6EV (three frames at -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,? said a spokesman.

To download the free upgrade visit