Sigma 50-500mm f/4.5-6.3 APO DG OS HSM Lens for Canon
For Digital SLRs w/ Canon EF/EF-S Mount Full Size or APS Size Chip Cameras Standard to Super Telephoto Zoom OS (Optical Stabilizer) Minimizes Blur Hyper Sonic Motor (HSM) Compatible w/Sigma APO Teleconverters