How to remove 'C-Cup' on a CP16-A
Posted 17 November 2008 - 08:48 PM
Is the c-cup just the silver part protruding from the front of the camera or is it also the black c-shaped part as well?
I have removed 4 screws from the black part and 3 screws from the silver part. Nothing moves. I assume I need to remove a few screws from the inside near the film gate?
Can anyone please tell me how to remove the c-cup properly?
Posted 18 November 2008 - 08:44 AM
To remove the cup, you have to undo the C-mount threaded part at the bottom of the cup. A special key made for this purpose was included with new lenses. If you don't have it, you could make yourself one out of a flat piece of tool steel. Otherwise a lens spanner wrench might be used be used or find a pair of solid long nose pliers and grind the tips to fit the notches snugly. That should do the trick.
Posted 18 November 2008 - 10:45 AM
Focus your diopter, making sure to focus on the GRAIN of the ground glass, not the format lines.
You should come to 5 feet on the lens focus mark, zoomed in tight.
If the lens is a 12 to 120mm, you will be at 120mm on the zoom.
If that looks ok, now check that the lens is calibrated to your camera:
Zoom the lens back to about 80mm or 100mm.
Focus on the target.
When you zoom the lens in tight, you should be perfectly focused at 5 feet.
Hope this helps.
Posted 18 November 2008 - 04:34 PM
@Bernie, thanks. I will do that test when I have the working lens in my hands
I am getting the lens repaired at Visual Products as they quoted me with the cheapest price for the repair. I assume they are a good, reputable company?
Edited by Ron Flex, 18 November 2008 - 04:38 PM.