Jeff - I could not find the name, but Sinar's part number is 531.41 I would think it would be called a lensboard retaining clip Bob -----Original Message----- From: Jeff Kelley <jlkphoto@xxxxxxxxx> To: rollei_list@xxxxxxxxxxxxx Sent: Thu, 27 Mar 2008 6:01 pm Subject: [rollei_list] Re: OT: Getting into 4x5 for the first time... For those who know the Sinar system, the following link shows a "lens board clip" that I assume can keep the lens from crashing to the ground when the holder is released? Any idea what this is officially called and where I might find one? http://www.gballard.net/images/salei/salepages/sinarf2body.html Jeff