Purtroppo, questa descrizione non è stato tradotto in italiano, in modo da trovare a questo punto una descrizione inglese.
Spacer plate PLATTE-U
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 550/600D, Rebel T2i or T3i and others. Professional models are not affected.
