Leica's fast APO R super-tele — the manual-focus APO-Telyt-R 400mm f/2.8, a corrected professional long lens.
The Leica APO-Telyt-R 400mm f/2.8 is a fast apochromatic super-telephoto prime for the Leica R reflex system, offering a bright f/2.8 aperture at 400mm with APO correction. It was a professional-grade long lens for sport and wildlife, part of the R modular telephoto approach. It is a very large, heavy lens built for demanding reach work.
This is a manual-focus Leica R lens with a 400mm focal length and a maximum aperture of f/2.8, apochromatically corrected (APO). It is a full-frame super-telephoto prime for the reflex line and a substantial lens requiring firm support. Buyers should confirm the filter arrangement, tripod collar and cam configuration on the specific example, and verify authenticity given its high value.
The 400mm focal length at f/2.8 suits wildlife, sport and distant action, giving long reach with a fast aperture for subject isolation and high shutter speeds. The APO correction targets clean rendering and controlled colour fringing at distance. It is strictly a tripod or monopod lens, delivering strong separation of far subjects with compressed perspective.
On the used market this fast APO super-telephoto is a rare and valuable professional R lens, so verify authenticity and full condition carefully before buying. Check for internal haze, fungus and dust, confirm the aperture operates cleanly, and inspect the tripod foot and heavy mount for wear. Verify the cam setup for correct metering on your R body; a Leica R adapter allows use on mirrorless cameras.