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 for the Leica R-mount SLR system. At 400mm, it provides serious reach for wildlife and sports. The f/6.8 is very slow — limiting use to bright conditions. The Telyt-R designation indicates Leica's telephoto range for the R system. Leica optical quality at a budget-oriented aperture.
Optical performance is decent — Leica quality but limited by the slow aperture. Sharpness is respectable when stopped down. The f/6.8 demands bright light or high ISO. The 400mm reach is useful for wildlife from a distance. Leica's multi-coating provides good contrast. A niche telephoto in the R-mount system.
Leica R mount. Filter thread varies. Weight varies. Build quality is Leica precision. Manual focus. The slow f/6.8 limits practical use significantly. Adapts to mirrorless via R-mount adapters. A tripod is essential at this focal length with manual focus. The R-mount pricing makes this an affordable long telephoto.
Available at lower Leica R prices — the slow aperture reduces demand. Check clean optics and smooth focus. A budget path to 400mm Leica optics. The f/6.8 severely limits practical use. Adapts to mirrorless where IBIS and live view help. Only for R-mount collectors or budget Leica telephoto experimentation.