Hi Ruggers A simple question from a friend of mine, to which I have no answer since I never considered buying a prism for my Rollei TLR cameras ;-) Which Rollei 6x6 cameras will accept a prism finder designed for the 2,8 GX ? apart from 2,8GX and FX of course, is this prism compatible with post-1957, interchangeable viewfinder Rollei TLRs ? Is the prism compatible with the SL66 or the SLX & 600x series ?? Thanks ! -- Emmanuel BIGLER <bigler@xxxxxxxx>