I see expodisc, some other wb filter, selling for hundreds of dollars. Are they really that good?
The Pringles lid (with the whitish colour, not the colourless version) will give similar results. In fact if you own the E-1, you have one built-in and buying the Expodisc would be a waste.
Personally I use a clear filter case with the white foam it came with for FREE...works just as well.
Actually when shooting in the city I'll use the sidewalk or a gray stone wall out of focus as a white/gray card.
I don't know how they can keep a straight face when selling the Expodisc with its price, I couldn't.