I am currently converting a Nikon F (great camera) from an SLR to an non-viewfinder leica screw camera. I have removed the front casting and mirror box reducing the weight by 250 grammes. I have made a new front panel from brass( I had planned to use aluminium for light weight but got impatient waiting for it to come by post and used what I already had in stock). I plan to use a Voiglander Heliar 15mm lens so lack of rangefinder shouldn't be a problem. I had originally intended to try to include one, see my earlier posts, and even acquired one through the kindness of another group member but realised my limitations before I had wasted too much time. The Heliar viewfinder will fit in the recess at the top of the camera (see photo). I am trying to keep the size and weight down as much as possible. The lens mounting ring in the photo will have to be reversed in order to achieve the Leica lens register of 28.80 millimetres but it can be done! One advantage of removing the mirror assembly is the reduction in noise, I intend using this camera for candid photography. I used to use a Contax II and it seems comparable if my memory is correct. So far I have done it all on my own but any input would be appreciated.