The cover itself makes a solid impression and the clamping mechanism makes a werigen impression. The withdrawal, there is that the cover on the back is centered exactly as deep as the clamping mechanism itself. As a result of the plastic pressing on the curved lens of the Sony NEX kit lens (18-55mm), which leads you to Selbiger scratches. But has failed for other lenses ensure a great replacement cover, the 49mm version on the NEX lens.