Guest Glenn Brady Posted September 28, 2006 Share Posted September 28, 2006 Can anyone tell me the accessory thread size on the Kern-Paillard 5.5mm f/1.6 H8 RX Switar lens? I need a step up ring from this accessory thread to 52mm. The accessory thread is larger than 30M. Link to comment Share on other sites More sharing options...
boy yniguez Posted September 29, 2006 Share Posted September 29, 2006 i believe that would be for the Bolex RX camera so the standard name for the mount would be C-mount. Link to comment Share on other sites More sharing options...
Guest Glenn Brady Posted September 29, 2006 Share Posted September 29, 2006 Yes, the lens is a C-mount, but I need the dimensions of the accessory thread - that's the thread on the front of the lens, not the rear. I want to experiment with some wide angle conversion lenses, but I've been unable to find an adapter to fit the front of the lens. Link to comment Share on other sites More sharing options...
Guest Glenn Brady Posted October 9, 2006 Share Posted October 9, 2006 The factory tells me the thread diameter is 32mm. Presumably, the pitch is 0.5mm or 0.75mm. Does anyone have a clue where I might get an off-the-shelf 32mm to 52mm step-up ring? Link to comment Share on other sites More sharing options...
Mike Rizos Posted October 9, 2006 Share Posted October 9, 2006 That's a very strange size thread. You may have to attach the ring to the Switar by your own method. You may also need two rings to get to 52mm. Try this place in the UK. http://www.vintagecameras.co.uk/stepping.htm Link to comment Share on other sites More sharing options...
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