Roger Cline walks you through making perfect pinholes and zone plates with a vector drawing program and computer-printed film from a graphic arts service bureau.
While zone plates are always made with film of some sort, I’m curious about light transmission loss using film compared to an empty hole for a pinhole. Anyone have info on this?
Read instructions at Cline & Company
Thanks for the post. I’ll be building a variety of cameras using this method in the coming weeks. I’ll post some images as soon as I can. I have not noticed any significant light loss in the past and my pinhole images seem to come out very sharp. Give it a shot (no pun intended). :)
Thanks
Excellent, can’t wait to see the results!
Just wondering if I clearly understood the facts: 1. with a ‘Lino’film output I’ll get test strips. 2. The strip should be used to determine right exposure time.
My question is if this can be used to magnify the image as I’d do it with a graphic camera and if I can use pinhole to get lineart (no gray shades needed). Formerly I had an offset printshop so curious with non-lens photography At this time I got a bit messed up with the word ‘zone plate’. Any good definition out there ?
Dan L.
1) You’ll get test strips if you make test strips.
2) Yes, test strips in general are for finding out the right exposure time.
2) You can use whatever aperture or lens you want to enlarge, but line art depends on the film you use. A pinhole enlarger (exposure will be LONG, possibly days) won’t be sharp like you’d probably want for line art.
“zone plate” is already linked to a definition in the post.