Zenit-TTL Single-lens reflex camera. Manufacturer: Krasnogorsk Mechanical Plant. 42×1/45.5 mm. Photographic material: Type 135 film. 24×36 mm. Shutter: Focal-plane shutter, mechanical, with horizontally moving fabric curtains. Flash: Sync contact "X" Viewfinder: Reflex, with a matte ring, micro-raster, and a fixed pentaprism. Dimensions: 138×100×93 mm. Weight: 1.01 kg. Made in USSR The Jupiter-37A is a Soviet-made telephoto anastigmatic lens for small-format cameras with an M42 thread mount and the ability to attach other adapters, including those suitable for Nikon, thanks to its interchangeable mount. It has a focal length of 135 mm, an aperture of 3.5, a resolving power of 45/30 lp/mm (center/edge), and a weight of approximately 0.41 kg.