Hi , I know nothing about microscopes . This microscope has been sleeping in the attic forever and a day . I don't know where it came from , possibly my brother brought it home ?????? Possibly from school or collage ???? Its " QUITE MESSY " , dirty , dusty , numbers scratched in it and such . I didn't wipe the optics off , I don't want to scratch the glass or damage anything on it . " PLEASE " see the pictures they show the general condition . One thing I can tell you is that " THE LIGHT WORKS " !!!!!!!!!! See the pictures . I have to sell it as broken for parts or repair . Sold as pictured , no returns . Thanks .