400mm · f/4
The Leica APO-Telyt-R 400 mm f/4 Module is a high-performance telephoto lens known for exceptional sharpness and contrast, with apochromatic correction minimizing chromatic aberration (OpticalLimits). Its build is robust and weather-sealed, but the lens is heavy and requires a tripod for stable handling (OpticalLimits). Weaknesses include slow autofocus and high price. It suits wildlife, sports, and nature photographers who prioritize image quality over portability and can manage its weight and cost (OpticalLimits).