Leica APO-Summicron-M 90mm f/2 ASPH. - Leica M Mount

The Leica APO-Summicron-M 90mm f/2 ASPH. is a high-performance telephoto lens for the M-system, designed for high contrast and resolution even at its widest aperture. Featuring a complex optical design with apochromatic correction and an aspherical element, it effectively eliminates chromatic aberrations. It is well-suited for portraiture and detail-oriented street photography, providing a shallow depth of field and smooth bokeh while remaining relatively compact for its focal length and speed. When inspecting a used copy, the focus action should be smooth and consistent across the range; any stiffness can indicate the need for a rangefinder recalibration or lubrication. Check the built-in telescopic lens hood for smooth extension and ensure it stays in place. SDS verifies the optical path for internal haze and examines the aperture blades for oil residue, which can affect performance on these high-precision optics.