Probably a silly question, but I have got a '70s Super Yasinon 1:8 Yashica supertelephoto lens (I think, that is on the lens, anyway. The body has no markings except 'lens made in japan'; forgive my ignorance). The serial number on the lens is R8000088. Anyway, it was my dad's.
Unfortunately while moving last year a family member somehow dropped it from a height of at least six feet to concrete. The end ring and part of the body is dented quite badly. Is this lens dead or could it be restored?