Leica's vintage telephoto — the Telyt 200mm f/4 for M-mount with Visoflex required.
The Leica Telyt 200mm f/4 is a super-telephoto lens from Leica for M-mount use, typically employed with the Leica VISOFLEX reflex attachment that provides through-the-lens viewing for longer focal lengths where rangefinder coupling is not practical. The Telyt designation indicates Leica's telephoto lens series.
The lens delivers 200mm at f/4 maximum aperture with Leica M mount coupling for the VISOFLEX or similar reflex attachment, manual focus, manual aperture, and full-frame 35mm coverage. The VISOFLEX converts the M camera into a reflex-viewing SLR-style system for telephoto use.
At 200mm on a Leica M body, the VISOFLEX reflex attachment is essentially required for accurate framing and focusing. The combination of Leica M body and VISOFLEX creates an unusual but highly capable telephoto system valued by photographers who want Leica quality at longer focal lengths.
Verify VISOFLEX compatibility with the intended M body. Inspect element condition and Leica coating integrity. Check aperture blade operation. Test focusing at 200mm via the VISOFLEX system for accurate parallax-free framing.