Kindly inform me as to the make and model of 6x12cm roll film holder that will fit my 4x5 Crown, which has a standard Graflock fit. I'd love to use 120 film and get the 6x12 format. Which lens is recommended for extra wide angle coverage?
The Horseman 612 will fit. It is more expensive than the Chinese ones, but very well made. "Extra wide" is a bit subjective but I would recommend experimenting with the back and whatever lenses you have now before you commit. The 1:2 aspect ratio can create a sense of "wideness" that 4x5 doesn't.