Ricoh GR DIGITAL IV US 10 MP Digital Camera with 1x Optical Zoom and 3-Inch LCD screen (Black)
The GR DIGITAL IV employs a hybrid autofocus system that combines an external auto focus with a conventional contrast autofocus system. It is newly equipped with an external autofocus sensor developed in-house that allows for high-speed, high-precision distance calculations for up to 190 points. The camera needs as little as 0.2 seconds for the autofocus to adjust, approximately half the time for the GR DIGITAL III. The scan area for contrast autofocusing is limited so the external autofocus sensor can adjust the focus even if you do not half-press the shutter-release button, allowing for more rapid focus adjustments than previous models. Improvements to the algorithm have increased the speed—as much as doubled it—even for macro autofocusing that uses only the contrast autofocus system.