【K&F】 NIK-EOS R K&F Concept is a one-stop refined photographic solution provider. K&F Concept specializes in design. research, manufacturing, and marketing of photographic accessories.K&F committed to creating professional and innovative products backed by friendly, responsive service to delight our distinguished customers around the world. Features: High quality and compact. Made of brass and aluminum (not plastic). 100% Brand New Color: Black Suitable for: Nikon F (auto,ai,ais,D) mount lens Canon EOS RF mount camera Note: If your camera indicated "lens is not properly installed", please modify the camera menu settings. Usually called the release the shutter the lens is not installed", you can modify the settings to allow. Specifically refer to the camera manual.