The Yashica Mat-124 is a twin-lens reflex camera produced by Yashica until 1970. It maintains many characteristics of the Yashica-24 and Yashica-12, but uniquely allows selection between 12 and 24 exposures by adjusting the film-pressure plate. This model features a four-element, 80mm f/3.5 Yashinon taking lens and a Copal SV shutter with speeds from 1 to 1/500 second, plus Bulb mode. It includes a self-timer and flash sync for both electronic X and bulb M modes. Focusing is achieved via a ground glass screen with a 3x diopter loupe and a sports finder. The Mat-124 also has a coupled match-needle exposure meter.