The Leitz 400mm f/5.6 Telyt is a long telephoto lens from the Telyt family, designed for distant subjects such as wildlife and sports. It is a slow-aperture, long-focal-length optic intended for use on Leica reflex housings or rapid-focusing accessories, depending on the specific mount configuration.

UK auction hammer results for this lens are thin: the only verified saleroom record in our dataset is £175 in June 2024, so any sense of a price range is provisional. As of 2026, that single data point suggests a clean, working copy is worth roughly the mid-£100s at hammer, though condition, glass clarity and completeness of accessories will move the value meaningfully in either direction. Retail dealer asking prices will typically sit above this wholesale level once buyer's premium and margin are added.