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ExpoDisc
Old 02-04-2007, 04:03 PM   #1 (permalink)
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I have been looking at the ExpoDisc here lately and wondering if anyone uses it and if they do can they tell a big difference between using it or a standard grey card.
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Re: ExpoDisc
Old 02-04-2007, 04:09 PM   #2 (permalink)
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Its quite different than a gray card. You attach the ExpoDisc to the front of your lens, or hold it there and shoot a test shot of a scene. This becomes the white balance reference shot for your Custom White Balance. If you use a gray card, you must have it held in the scene by someone, and then you photograph it filling most of the frame. You then use that as the reference photo for the CWB. The advantage of the ExpoDisc is that you don't have to leave the camera position to do the CWB, or have someone hold a card, etc. The big drawback of he ExpoDisc is the $100 price tag. But if you like the concept of the ExpoDisc, you can get the same effect, by just using a white coffee filter (or a pringles lid) and holding it over the lens for the reference shot.
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Re: ExpoDisc
Old 02-04-2007, 04:15 PM   #3 (permalink)
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I prefer to use the exact type of paper that I print on to do my CWB, and right at the subject's face. To me, with my style and technique, that's the best way for me to personally get as true a WB as possible.

If you use a white card, try using the same paper you print on. It does make a difference.

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Re: ExpoDisc
Old 02-04-2007, 04:25 PM   #4 (permalink)
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That's a good idea. I often print the equivalent of "warm" cards on the same paper I use for printing photographs and then use them for CWB when I want a warmer CWB. This cheats the system and makes a warmer white balance in varying degrees.
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Re: ExpoDisc
Old 02-04-2007, 08:25 PM   #5 (permalink)
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That's a great idea. Thanks.
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Re: ExpoDisc
Old 02-04-2007, 09:04 PM   #6 (permalink)
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I still like the expodisc, it's quick and handy. Just snap it on the lens and do a quick WB. It is a hundred bucks, but it is a one time purchase. I'd hate to pull a coffee filter out to white balance in front of a customer.
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Re: ExpoDisc
Old 02-04-2007, 10:54 PM   #7 (permalink)
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Your technique certainly works well for you Dave.
Another great tip.
Vic
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Re: ExpoDisc
Old 02-05-2007, 11:34 AM   #8 (permalink)
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I like the paper you print on idea, but what do you do if you have the lab print your pictures?

Anybody uses the Whibal card? http://whibal.com/
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Re: ExpoDisc
Old 02-05-2007, 01:10 PM   #9 (permalink)
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I'd ask them for some scraps of paper. The lab I work for uses Fuji frontier machines and before every print run it send through 2 blank 6x6 pieces of paper, we usually just throw them away or use them for notes.
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Last edited by zytkiewicz; 02-05-2007 at 01:25 PM.. Reason: mistyped blank as black
 
Re: ExpoDisc
Old 02-05-2007, 01:21 PM   #10 (permalink)
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What would you do with the two "black" pieces of paper relative to custom white balance?
Cheers,
rfs
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