The Vivitar 250/SL is a Cosina-made M42 mount, 35mm SLR, marketed by Vivitar. The Vivitar 250/SL was identical to the Vivitar 220/SL except for the addition of a shutter release lock lever, a battery check light, and a battery check button. The two cameras have identical specification and share the same instruction manual. This camera included typical features for a mid-range SLR; exposure counter window, film plane marker, and a "film-in-chamber" indicator near the rewind crank. The camera included an X Sync hot shoe. M Sync and X Sync flash terminals are available on the side of the camera. The focusing screen provides a micro prism spot to assist with focusing. Shutter speeds ranging from Bulb to 1/1000 of a second were possible with the vertical moving metal Copal Square shutter. The shutter release included a cable release socket and a self-timer. The camera included dual behind the lens CdS cells. The battery-powered light meter used a single 1.35 volt mercury cell: Mallory PX-675, Eveready E-675, or equivalent.