The AE-1 lenses have Canon's FD breech-lock lens mount. They are not compatible with Canon's later EF lens mount. It may be possible to find an adapter, but performance would be lost, and the lens...
I have used a 80 - 200 F3.5 Tamron zoom on my Canon A1 almost exclusively for 35mm with great results. It's not a Canon lens as you specified, but I thought that might help anyway.
All lenses that have a "ef" or "ef-s" mount can work on a canon 50d. Be mindful, if you decide to go with a fill frame camera later on, the "ef-s" lenses will create heavy vignetting on those cameras?
Not sure if it's what you're looking for - but check the related link to Amazon's web-site. I typed in your camera model and it gave 58 results. NOT all are lenses - there's other stuff mixed in -...