I took a day off work to catch up on some projects here at home. One of those was to find the information to place an order for the Expo-disc. I've been wanting one for my 70-200 2.8L.
I put a check in the mailbox for my disc, came back inside and logged on to the forums. Just as I had finished reading this thread, I saw our mail carrier driving into the neighborhood. I jumped up and ran out to the mailbox to remove my order just in time. What makes this so strange is that I recieved my Gevalia Coffee shipment as I was standing there, complete with #4 cone filters!!!!!!
For what it's worth, basket filters work just as well, and you can beg those off a convenience store or restaurant, if need be. Three basket filters gave me proper exposure and color balance.
I'm also wondering if the 'bright-white' plain inkjet papers (100+ brightness rating; Epson, HP, Kodak, Xerox, etc) sold at Staples & other office suppliers have the bleached-white neutrality needed to make this trick work. I wonder if one brand of paper is the most neutral white.
Yay---I have Cokin filter setup and I'm going to try it. I usually use grey/white cards--and have tried the Pringles (no, we didn't eat them LOL). I really couldn't bring myself to pay the price for the expodisk and instead tweaked WB in RAW if needed. This looks like fun (however, I don't drink coffee and for my Mr. Coffee for friends, I have those 'natural' filters which are brown LOL).
Thanks--another neat thing found by experimentation.
This is a total hoot -- I love it. You will not believe this -- I ran to the kitchen - grabbed about 25 mr coffee filters and they are now nestled right beside my lenses in the bag
GREAT IDEA
WOW
Tom
I don't want to turn anyone's coffee bitter but . . . .
Pictures are supposed to capture what is there. While I agree that the camera is recording the light wrong, I am not quick to rush and make everything into a perfect WB that actually changes the mood or atmosphere that the lights are creating. As you can see, it is easy to wash out all the colors of any color cast, but a light bulb does have a color cast and it is MUCH harder to try and record the picture as you see it rather than making whites "white".
Okay, I go along with the coffee idea, I am trying to point out to not try to take all color cast out of the picture. How much, a little or all is your call, but try and remember how a warm looking room by the fire really looks with it's color cast and all.
So... I was wondering. Instead of mounting the coffee filter inside a normal camera filter, I was thinking of this. How about stacking 3 coffee filters, cutting them into a square, and getting them laminated? Do you think the lamination could throw off the color?
This coffee filter thread is good for some good laughs but, from what I've tried, the method seems to work. So, heading out to shoot a couple of basketball games last night I put not one, but two coffee filters in my camera bag.
I get to the gym and get my camera out of the bag and look for the filters and can't find them. I look and look and, lo and belold, they fell out my bag when I was getting the camera out and were sitting on the floor!! And, of course, they didn't fall together like I put them in the bag, they fell and separated so one could clearly see not one, but two coffee filters sitting on the floor!! Geesh, I can't even separate those filters in the morning when I'm trying to make coffee!!
Fortunately, I was actually to the side of the bleachers, so there weren't too many witnesses. I picked them up, held them to the lens, set WB and shot away...thinking about this forum and how it's "helped" so many of us.
I see you made the consumer grade version, cause I don't see a red L band or a green DO band 
