I was given a Hanimex 135mm lens that has a M42 mount. It was clean and tidy all over including the optics. It is made of metal with a small lens hood and accepts 52mm filters. Focusing is nice and smooth, but the aperture ring is very close to the mount, I would say too close and feels a bit delicate. A little research on the web showed that a few people own this lens with the aperture ring not working, though it is easily fixable. I have seen these lenses on ebay for £/$10.00. anyway, here is the picture of this lens and the pictures it can take. I wish I saw that fly at the time.