Spiratone-Plura-coat 20mm f/2.8 fast prime wide angle lens. Serial #212752. Fits Olympus OM mount cameras like the OM-1, OM-2, OM-3, OM-4, OM-10, OM-G series of 35mm slr cameras. Will also work fine with manual focus on mirrorless digital cameras like Sony NEX series, a5000-6000 series, Sony full-frame Sony a7, a7II, a7r, a7RII, a7s, and Olympus or Panasonic micro 4/3 cameras with the proper adapter. Lens is in Mint- or 9 of 10 cosmetic condition. F/stops from F/2.8 to f/22. Close focusing down to .7' or.2 meter. 58mm filter size. Clean glass and lens coatings. Some small dust spots inside that can only be seen with a flashlight. Smooth focus. Good working lens aperture. Nice fast sharp wide angle lens. This hard to come by extra wide angle 20mm f/2.8 compact fast prime Spiratone lens sell with no reserve at a price of $145.