It is a very rare classic, full-frame, precise, manual focus, super-macro and super-telephoto, zoom lens. This unique lens covers the focal lengths of 10 fixed focal length lenses:
75, 100, 135, 150, 200, 270, 300, 400, 600 and 900mm (on a DSLR camera with APS-C sensor).
This lens is used for wildlife, sports, nature, close-up, macro, and astro-photography. This lens allows you to photograph very small objects not only in life size 1:1 scale, but also several times larger than its actual size. This allows you to see in detail even very small objects in the photo. Along with these unique macro capabilities, the lens allows you to photograph especially very distant objects that are in infinity, which are completely invisible to the naked eye. The lens glass has an excellent multi-layer coating that provides excellent contrast and natural colors.
The lens is absolutely clean. All rings move smoothly. Brand New condition. It is from my 64-years collection.
***You can use this lens with any DSLR or Mirrorless full-frame or smaller sensor digital cameras with an appropriate adapter. If you do not have experience using classic precision lenses on digital cameras, I can give you full professional explanations and recommendations about any appropriate adapters, just let me know the exact model of your digital camera and I will send you a link of a good affordable adapter for your camera.