Praktica's electric-contact M42 SLR — the LLC, TTL CdS metering, manual exposure, 1969.
The Praktica LLC is a 35mm film SLR made by VEB Pentacon in Dresden, East Germany, introduced at the end of the 1960s within the L-series family. It was notable for pioneering electrical aperture communication through the lens mount, using dedicated electric-contact lenses to relay the set aperture to the meter for open-aperture metering, which was unusual for an M42 body at the time.
It is an M42 screw-mount SLR with a metal vertical-travel focal-plane shutter offering speeds up to 1/1000 plus B. The LLC carries a battery-powered CdS through-the-lens exposure meter with a match-needle display in the pentaprism finder; with electric-contact Pentacon lenses it meters at full aperture, and it stops down for conventional M42 optics. Exposure is manual, with the shutter mechanically timed so it fires without a battery, though the meter needs power to function.
The LLC suits students and general users wanting TTL metering in an inexpensive M42 body, with the bonus of quicker open-aperture composition when paired with matching lenses. It handles like a typical L-series Praktica, solid but plain, and its main draw is the metering system; the trade-off is dependence on the specific electric-contact lenses to get the fullest benefit.
When buying, test the CdS meter with a fresh cell and check whether the original design expected a mercury cell, as voltage differences shift readings; adapt or compensate as needed. Confirm the electric lens contacts are clean and the meter responds when the aperture ring turns on a contact lens. Inspect foam light seals and mirror damper for the usual perishing, run the shutter through its range to check for capping, and look for prism desilvering. Check advance, rewind and screen condition.