I've been contemplating the purchase of an Expodisc to finally be rid of most white balance corrections. The price is a little steep for me, however. I was wondering, is there a way to make something similar to this using materials that one might find 'off the shelf' at a store like Home Depot?
I've tried lenses (prismatic diffusers) from lighting fixtures combined with various translucent plastics without much luck.
Note, the price is not that steep, I'm just one who sticks to a very strict gear budget and I like the satisfaction of making my own stuff.