A kind help request about... math!

Hallo dears,

doing calculation has never been my best skill, so I am here to kindly ask for a little help. I am purchasing a 6*7 graflex 120 magazine, that should be the base for building a pinhole fixed focal length camera.

I already own a 0.2 mm pinhole, but trying out the usual pinhole calculation tool i was not able to get a focal distance that could give a wide angle of view and enough coverage for the negative.

I can order a new pinhole if needed, but now i have no idea how to get a corret coverage of the negative and the FOV of a wide angle lens, something like a 24 or 35 mm on 135 format.

thx for Your attention, have a nice day You all!

;)