The Praktica LTL is an East German 35mm SLR camera manufactured by Pentacon from December 1970 to November 1975. It features interchangeable M42 screw-mount lenses and stop-down TTL metering. The camera has a vertical-travel focal plane shutter with speeds from 1s to 1/1000 + B, and a 10-second self-timer. Its meter is activated by a paddle that also functions as a depth-of-field preview. Focusing is achieved via a Fresnel lens with a central micro-prism spot and ground glass outer collar. The LTL includes a hot shoe for flash and a shutter release lock. It requires a PX625 mercury battery for the meter, but the camera itself is entirely mechanical.