http://www.nolanledarney.com/canon-lens-mount-converter/

Why will my Tamron 75-300 mm lens not mount on my Canon EOS Xsi?
I recently bought a new camera lens for my Canon Xsi, and it appears as if it will not attach to the body. Do I need to buy some sort of lens converter?
thank you!
Cameras have specific lens mounts, so that Canon will only take a lens with a Canon-specific mount (and Canon distinguishes between the EF, EF-S and manual focus mounts). Pentax cameras take pentax-mount lenses, etc.
Thus, it’s likely that the Tamron lens you have is in the wrong mount if it won’t fit on your Canon. Check the box it came in for confirmation and/or exchange it from the place you bought it. And if it’s a manual focus Tamron lens for a Canon, note that Canon manual focus lenses are totally different from Canon’s autofocus lenses (EF and EF-S).
Minolta MD Lens to Canon EOS Focusing Lens Mount Adapter from Dinodirect.com
|
|
CANON AUTH LENS MOUNT CONVERTER P M42 S SCREW MT TO FD $49.99 |
|
|
Canon Lens mount Converter P Screw mount to Canon FD $6.00 |
|
|
EOS EF to Canon FD Lens Mount Converter Made In Japan $69.00 |
|
|
EOS EF TO CANON FD LENS MOUNT CONVERTER $39.00 |
|
|
CANON LENS MOUNT CONVERTER P/94594 $50.00 |
|
|
CANON LENS MOUNT CONVERTER P/94595 $50.00 |
|
|
CANON LENS MOUNT CONVERTER A/108984 $75.00 |
|
|
CANON LENS MOUNT CONVERTER A/113134 $85.00 |
|
|
CANON LENS MOUNT CONVERTER A/104875 $95.00 |
|
|
CANON LENS MOUNT CONVERTER B/127039 $75.00 |
|
|
Canon WD-H58 Wide Converter Camcorder Lens $265.00 Wide Converter WD-H58… |
|
|
Bower MC4 2X AF Teleconverter for Canon EOS EF Lenses – Bower SX4EOS $75.00 Bower MC4 2X AF Teleconverter for Canon EOS EF Lenses – Bower SX4EOS… |
|
|
Sigma APO Teleconverter 2x EX DG for Canon Mount Lenses $299.00 The Sigma APO Teleconverter 2x EX DG for Canon Digital SLR Cameras is a dedicated APO teleconverter that can be mounted between select lenses and the camera body to increase the focal length by the power of two. The multi-layer coating reduces flare and ghosting, which is a common problem with digital cameras. The lens also offers maximum magnification without any variation in the minimum focusing… |