August 31, 201510 yr Looks like it is one of those mirrorlenses with ND filter built in? I`ve seen Soligor mirror lenses with similar design but not sure who made them...
September 1, 201510 yr Looks Rusky. They made some good ones ... big klunky good ones. It has the build clues of an astro design reconfig'd for photo. Frinstintz, it has no front filter threads yet it's no bigger than a typical zoom that would use 72mm filters. It may have a gel holder or a 40.5mm filter holder in the rear, but my 500/8 has both a 30.5mm fitting in the rear and a 67mm in the front cuz it's designed primarily as a photo lens, so small and light it doesn't even have its own tripod fitting and doesn't need one. I also have an astro design twice its size it has a very necessary tripod fitting at the approx' balance point [and has no front threading which would be 100mm +/- , if it had it]. At $20 just bag it ! Enjoy ! ` `
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