Ricoh’s GR cameras and Fujifilm’s X-E and X100 series are probably the most popular affordable street photography cameras. Although both are ultra-compact APS-C cameras, there is at least one unique street photography feature that sets Ricoh apart from Fuji: snap focus. This allows the camera to be set to a fixed focusing distance (such as 3 meters/10ft) for ultra-fast snapping. When Snap Focus is enabled, the camera shoots with minimal delay because the autofocus does not hunt.
In addition, Snap Focus minimizes the risk of misfocusing when a photographer has internalized the right distance between camera and subject and set a small aperture for a wider depth of field. Snap Focus is therefore a direct functional equivalent of traditional zone focusing techniques in rangefinder photography but on a digital autofocus camera.