Leica 50mm F2.8 Elmar Lens Collapses neatly into the M body Slim Profile when Mounted on Camera Perfect Lens for Travel Relatively Fast and Very Compact Superb Image Resolution, every bit as good as the Summicron If you Own it, You will Love it Small front Element has Superior Flare Protection The Lens that Made Leica Famous Available in Black or Silver 4 Elements in 3 Groups Filter Size is 39mm Apertures from F2.8 to F16 Focuses from .7 Meter to Infinity Screw on Lens Hood included (shown mounted in picture) Compact, Lightweight, Slim Profile, Sharp, Inexpensive, Beautiful Lens perfect for All Subject matter