Hi all!

I'm seriously thinking of building my own pinhole camera. However, I'm an absolute beginner, so I feel I need some advice...

I'd like to go for a film camera taking 120 rolls. I had a look at the camera wizard at mrpinhole.com and I got the following values: focal 45mm; pinhole 0.28mm; f stop 159; angle of view 86.7. So, as far as I understand, I have to make sure that the film is at 45mm from the hole... Do these values seem correct?

Also, I need some knobs to advance the film, but I'm wondering how I'll be able to know how much I'll need to advance the film if I don't want the views to overlap. Any hint on how you are doing that guys???