This is probably a dumb question, the results are probably not going to be great, but here goes. I just recently was given a cool old zoom lens for an 8mm movie camera. What I would like to do is add some sort of lens behind this one to hopefully give it some added coverage. Sharpness is definitely not an issue, I just want to make some sort of Frankenstein camera. I'm hoping to get coverage up to 120 film...any thoughts on what would be a good/cheapish thing to try?