The item is tested, operational and ready to be used. Used to correct parralax on Mamiya TLR Cameras as: C22, C33, C3, C2, C220, C330, C330F, C220F... If you have any questions, send us a message and we'll try our best to help you! Canon Nikon PENTAX Panasonic FUJ I FILM SIGMA TAMRON. SONY STEINER HOYA cokin JOBY Manfrotto V ANGUARD LOWEPRO.