Mount your Canon camera directly to any spotting scope or binocular for perfect alignment. The anodized aluminum shell and Canon bayonet fittings mean the adapter fits and works just like a Canon lens, simply remove the lens and twist on! The polymer compression ring ensures a perfectly centered image as well as a mar free interface to the spotting scope, a simple twist and it is locked on! The double sided, anti-reflection coating on the clear glass filter provides protection against dust or water entering the camera body at all times. Patent Pending.