I came across a 52mm prime lens in a pawn shop the other day. I had a look at it and I'm intrigued that I can't find any info on this online. I didn't jot down additional details because I was a little let down it wasn't a mk1 50mm like I thought when I first saw it. But it's a solid, metal body lens so it has build quality going for it. Anyway, is this a lens you could clean up and use on a DSLR? I could probably get it cheap but it's worthless unless I know what it's capable of or if it should just sit on the shelf. Thanks!