Leica APO-Summicron-SL 90mm f/2 ASPH. Lens with One Aspherical Element, Dust Resistant, Moisture Resistant, Floating Elements System, Internal Focus, Full-Frame Format, f/2 to f/22 Aperture Range, Autofocus, 0.2x Maximum Magnification Leica APO-Summicron-SL 90mm f/2 ASPH. Lens is a favorite lens of many for portrait photography. Its optically refined short telephoto prime is specially designed for a full-frame L mount mirrorless camera and gives superior images. It has 90 mm focal length that becomes more powerful when combined with bright f/2 maximum aperture. Use it even in low light conditions and the lens will ensure that you get the desired picture quality all the time. You get great control over the depth of field in case you require isolating the subject matter. Our Take on Leica APO-Summicron-SL 90mm f/2 ASPH. Lens: Leica APO-Summicron-SL 90mm f/2 ASPH. Lens comes with an apochromatic optical design to suppress the color fringing and chromatic aberrations. The design uses anomalous partial dispersion glass for high clarity and color accuracy. The lens provides improved sharpness by reducing the spherical aberrations with the help of the one aspherical element included. Leica has used multi-layer coating for great image quality in strong lighting conditions. The coating limits flare and ghosting that plays a damaging role for any photographers/videographers. Leica APO-Summicron-SL 90mm f/2 ASPH. Lens has Dual Syncro Drive stepping motor that delivers quiet and fast autofocus in any working environment. The motor gets great help from the floating elements system in maintaining consistent image quality throughout the focus range. The lens is made for a harsh working environment so you do not feel unsafe to use it where there is a lot of dust or moisture. There is a water- repellent AquaDura coating that is used on the exposed elements for better safety to your lens. The weather-sealed design gives protection from dust, dirt, and moisture for the whole assembly