I have been pondering repairing a prontor shutter in an old folder which sticks on speeds below 25th. I've read on some forums that it can perhaps be removed from the camera, the lens elements taken off and then soaked in some lighter fluid to dissolve the gunked up lubricants.
I've managed to get the front off (and the distance scale) without problems, however I've come unstuck at this point
I had thought that this metal section should simply unscrew, but it doesn't (simply, it seems to want to fight about it). By the way, thats a magnet tool there, not a broken screwdriver (I'm not that rough) .
In fact you can see a small mark that I put on it from my attempt. Now, even though I (thought) I was careful I've observed that I've put small dent in this ring (you can just see it in the image in the exact left hand side of the ring (the "focus" marker is pointing to it). I only noticed this upon taking and posting these images.
So, my questions are:
- how can I best unscrew this to expose my shutter
- what's the best strategy for straightening that ring?
I was thinking of shaping some doweling wood and using that with a small hammer to tap it straight (hoping that the wood will damage the thread).
So, should I continue with this, or just get a whole new "unit" off ebay?