I have been looking at C-mount CCTV lenses for the GF1. I discovered that Pentax still makes these, but there are different ones for different sensor sizes.
Obviously the largest (1") would be ideal, but the question is:
How can you tell which lens is for which sensor size? If one of these lenses is offered on ebay or wherever, is it obvious which ones are for 1" versus 2/3" sensor sizes?
And then how does this affect machining for infinity focus?
Any help is appreciated.