[. . . ] [. . . ] â· If the anti-theft screw is used to secure the lens, the lens cannot be removed when the LENS RELEASE button is pressed. If you try to attach the lens to the projector without removing this cap, the optional lens attachment part can be damaged. Insert the replacement lens with the top position mark on it facing up, and then turn the lens clock-wise until you hear a click sound. â· Make sure that the lens cannot be released even when you try to turn the lens anti-clockwise and pull it out. [. . . ] [. . . ]