I'm looking for a super cheap prime to use on a Canon Rebel G film camera. I know the 50 1.8 is around $120 new, but I wanted to know if there are any 3rd party lenses that would be cheaper than that. I would prefer it be within the 30-60mm range. I wasn't sure if sigma/tamron/whoever made any cheaper primes. Also, autofocus is not important. Even if the lens included AF, I'd more than likely be focusing manually anyway. Any suggestions?? Thanks in advance.