Leica's ultra-telephoto for R-mount — the Telyt-R 400mm f/6.8 for long-range work.
The Leica Telyt-R 400mm f/6.8 is a super-telephoto prime from Leica's R-mount SLR system, providing a compact single-focus design optimised for hand-holdable use at 400mm in combination with the Leica TELEVIT focusing unit. The f/6.8 maximum aperture is unusually slow for a Leica prime.
The lens delivers 400mm at f/6.8 maximum aperture with Leica R bayonet coupling, manual focus, and full-frame 35mm coverage. The Telyt-R 400mm was designed as a complement to the TELEVIT focusing unit which provides a pistol-grip focusing mechanism for rapid handheld telephoto use.
The f/6.8 maximum aperture reflects the compact optical design Leica chose for the Telyt-R, prioritising field portability over maximum light gathering. The TELEVIT focusing pistol grip was specifically designed for this lens. Without the TELEVIT, it requires careful focus technique. Leica R telephoto glass is sought for adapted use on modern cameras.
Verify Leica R cam configuration (1, 2, or 3 cam). Test focus ring or TELEVIT coupling if included. Inspect element condition and Leica coating quality. Check aperture blade operation at f/6.8. The TELEVIT unit, if included, significantly enhances practical use.