So I am making a Camera Obscura in my bedroom. The window I will be using faces a wall about 10 feet away (I can take a precise measurement if needed).
So my question is this....I found the formula for the diopter strength I need....but how big should the lens be to create a good sized image on the walls....I want it to take up most of the wall....at least a 5x5 foot type of image. I have seen people use lenses as small as an inch or 2 but I feel like the projection with a lens that small would not be large enough.
Any help on this would be greatly appreciated from all you lens experts!!!
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