Designed specifically for Canon's EOS cameras, the Canon Wide T Adapter from Tele Vue is compatible with Tele Vue's Imaging System (IS) accessories.
Due to the restricted light path found in typical T-mounts, astrophotography with Canon EOS cameras can exhibit a significant amount of vignetting. The Canon Wide T-Adapter minimizes this issue with a 25% larger opening.
Canon EOS bayonet mount
Compatible with Tele Vue's Imaging System accessories
Wider opening minimizes vignetting for edge to edge coverage