The STC-AF56B auto focus block camera has all of the same low vision magnifier reading system features and on-camera processing as the STC-AF66 camera. The STC-AF56B has a standard resolution (510 x 494) CCD. This camera also has an optional dual element close up lens, which allows the camera to auto focus through the entire zoom range at a target only 25 cm away. Composite; Y/C; RBG.