I cannot afford to spend $500, $1000 or more for a nice macro lens, so I found an old Canon FD 200mm F4 Macro lens on Ebay for $300. It is an awesome macro, but I need another old macro lens that is more in the 50-100mm range. With the 200mm, I end up having to back a little too far away from the subject at times. Constantly getting up and walking over to reposition the subject is annoying. Any recommendations for some incredibly awesome vintage macro glass?