Gear purchase help, I really hate to ask.

[Village Idiot]

I'm unfamilar with all the canon mounts, but his t1i cannot mount an FD lens correct? If I'm wrong, and it can mount, I see used 135 f2 FD for $499 at KEH. Not sure how well the FD to EOS adapters work though.

Canon Manual Focus 135 F2 FD (72) 35MM SLR MANUAL FOCUS TELEPHOTO LENS - KEH.com

Or an extra $389 for a newer AF version
Canon EOS 135 F2 L ULTRASONIC (72) WITH CAPS 35MM SLR AUTO FOCUS TELEPHOTO LENS - KEH.com

Not without an adapter.

Early Canons (10D and earlier?), APS-H and FF sensor Canons are all EF mount and only accept EF lenses. Most all APS-C sensor Canons are EF-S mount and can accept EF and EF-S lenses.

 

[jake337]

I'm unfamilar with all the canon mounts, but his t1i cannot mount an FD lens correct? If I'm wrong, and it can mount, I see used 135 f2 FD for $499 at KEH. Not sure how well the FD to EOS adapters work though.

Canon Manual Focus 135 F2 FD (72) 35MM SLR MANUAL FOCUS TELEPHOTO LENS - KEH.com

Or an extra $389 for a newer AF version
Canon EOS 135 F2 L ULTRASONIC (72) WITH CAPS 35MM SLR AUTO FOCUS TELEPHOTO LENS - KEH.com

Not without an adapter.

Early Canons (10D and earlier?), APS-H and FF sensor Canons are all EF mount and only accept EF lenses. Most all APS-C sensor Canons are EF-S mount and can accept EF and EF-S lenses.

Yeah and after reading a bit more I see that adapters degrade the image quality and the one that doesn't is more than the OP's budget and won't work with the lens I posted anyways.