I've been hearing about how different frequencies of light will focus at different focal lengths. This is why lenses have coatings, to bend them back to the same plane.
I've heard this happens with pinhole, but no way to rebend the light. Just wondering if the resulting images might be of different sizes too, i.e. the red image might be just a little higher and wider than the green image, etc.
Just thinking that I might be able to retweak things in photoshop by changing the height and width of the resulting image for each color channel. I know, off-the-wall question.