In the event a wide angle- or fisheye zoom lens hood contacts the upper clamping plate, then don’t tighten the camera screw to much. This would exert great pressure on the camera body and may damage your camera or lens. In this case, a spacer plate, such as the PLATTE-U is required. Alternatively use a battery grip. The problem only appears with compact DSLR’s such as the EOS Rebel models and others. Professional models are not affected.