You may have already read my review of the 50mm f3.5 macro lens, also for the canon FD mount. I like that lens quite a bit, but as I continued to use it, I realized that I had to get very close to my subject in order to take a picture at the closest focus distance. I started wondering if maybe, I might need a macro lens with a bit more reach. That’s when I started looking at the Canon FD 100mm macro lens.