Canon A-1 Fish Eye Lens?

I'm surprised that Jeroen is quick to assume that teens these days are into film. Perhaps he is right, but I would be even more surprised. But yeah, the quality is going to be low on an adapter/filter because it's cheap glass. I shoot primarily with the AE-1 and have had remarkable results. Good luck!

In the days of Canon's FD mount fisheyes were rare, not many people had a use for them. Combine that with the less than stellar built of a lot of canons of that era and you've got some pretty scarce and therefore expensive lenses. You are likely a cool teen looking to do some obligatory creative shots of skatebording in which case screwing an adapter onto your 20mm would be the most affordable option