Yashica LM Twin Lens Reflex Medium Format Film Camera Professionally Tested in Amazing Condition The Yashica-Mat LM was introduced in 1958. "LM" stands for Light Meter, referring to the uncoupled selenium cell exposure meter in front of the viewfinder. It's an all-mechanical camera; even the light meter doesn't need a battery.
The Yashica-Mat LM is a solidly made, easy-to-use camera. It has a Copal central shutter with speeds from 1s to 1/500 and B. It offers flash sync at all speeds. The taking lens is a 3,5 Yashinon, an 80 mm four-element lens said to be of the Tessar design. It can be stopped down to F/22. The viewing lens is a 3,2 Yashinon.
It accepts bay I filters. Shutter speeds and diaphragm are set by two wheels on the front plate, the values set are shown in a window above the viewing lens. Looking onto the ground glass in the waist-level finder, both values and light meter indications are visible.
Focusing is done by a focusing wheel on the left of the camera. It has a distance scale surrounded by a depth of field scale engraved in the body. There is a small window in which you can set the ISO value of the film you use and scales for LV, shutter speeds and diaphragms. The body is all-metal, covered by black leather. It is quite a heavy camera, about 1.2 Kg. Film transport and cocking the shutter is done by a crank. Winding makes a rattling noise.
Viewfinder is clear. Glued on the top and is very secure.. Best used with leather case. Its viewing hood contains a fresnel screen with red grid lines (5×5) to help composition. For exact focusing, it has a magnifying loupe. The camera is loaded by opening the bottom: turn towards the "O" to open. It uses 120-rollfilm only, on which it takes 6×6 pictures (or more accurately: 55mm × 55mm) Lower shutter speeds below 1/25 are not 100% perfect, remember its a vintage camera.