to make reproducible flat frames I made myself a light box from
polystyrene, LEDs, and some diffusers made from drafting vellum. At
first this box worked real well, but later on it turn out that the
paper diffusers weren't coping with the wet weather we have here in The
Netherlands and they started to wrinkle. So I have made a Mk II version
using a back light from an old laptop which found elsewhere on this
site. Below are some images that illustrate this Mk I version, as well
as the first light image with it.