Leica's extreme R reach tele — the manual-focus Telyt-S 800mm f/6.3, an 800mm super-telephoto prime.
The Leica Telyt-S 800mm f/6.3 is a very long super-telephoto prime associated with the Leica reflex system, giving extreme reach for far distant subjects. It sat at the long end of the Telyt telephoto family and was a specialist lens for wildlife and distant action. It is a large, purpose-built long-reach optic.
This is a manual-focus long telephoto with an 800mm focal length and a maximum aperture of f/6.3, used on the Leica R reflex line via its mounting system. It is a full-frame super-telephoto prime and a very large lens requiring firm support. Buyers should confirm the exact mounting and cam arrangement for their body, along with the filter and tripod setup, on the specific example rather than assuming.
The 800mm focal length delivers extreme reach for wildlife, sport and far distant subjects that no shorter telephoto can frame. The f/6.3 aperture is modest, so it needs good light or higher ISO for adequate shutter speeds. It is strictly a tripod lens, giving heavily compressed perspective and tight framing of very distant subjects.
On the used market the Telyt-S 800mm is a rare specialist long-reach lens with a small pool of buyers. Check the large front element for haze, fungus and coating wear, confirm the aperture and focus mechanisms work smoothly, and inspect the tripod mount for the considerable weight. Verify the exact mounting and metering arrangement for your R body before buying, as the setup for such long Telyts can differ from standard R lenses.