Apparently an optics guru made this post invisible.
Can anyone direct me to detailed instructions on haw to build a Camera Obscura ?
More precisely:
I know that the head contains a first-surface mirror with a condensor lens assembly below it, and that the viewing table is parabolic.
Now the questions:
How to determine the formula for the table surface: what do I need to know about the lenses to derive the formula?
and yes, a fixed-focus model would be nice.
I asked this some time last year, or something like it-- I’d search but my connection’s wussy. There are some sort of wimpy diagrams out on the web somewhere.