Peak Design Lens Kit (Canon) Compatible with Canon EF and EFS Lenses The double bayonet mount lets you hold up to 2 lenses at a time, or keep one bayonet mount free so you can conduct a fast lens change. Securely hold lenses of any size/weight, from mirrorless lenses up to heavy pro glass. Includes: Lens Kit Adapter for Canon EF Mount - (Capture Camera Clip available separately) Use on a Capture Clip or a Strap (available separately)