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View Poll Results: What do you use for custom white balancing
White card 3 21.43%
18% Gray card 1 7.14%
White printer paper 4 28.57%
18% Gray cloth 1 7.14%
Expodisc or similar White Balance filter/cap 2 14.29%
Other 3 21.43%
Voters: 14. You may not vote on this poll

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Old Jan 18, 2010, 3:26 PM   #21
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Thanks jim, I read that a long while back. That was one of the reason I did not get a 18% gray card and stuck to my white card all these years.
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Old Jan 18, 2010, 3:27 PM   #22
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It should still get you close, and like you said, it could perform more than one duty (white balance and exposure).
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Old Jan 18, 2010, 7:26 PM   #23
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Quote:
Originally Posted by JimC View Post
I dunno. That patent application may be disputed because of similar prior art, due to patents pending for the use of a WBC (White Balance Cat). ;-)
Not to be arguementative, nor insulting, (to Cats) but you might as well try to herd cats - It will be a heck of a lot easier than going around with one in the streets or countryside...

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Old Jan 18, 2010, 8:09 PM   #24
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Quote:
Originally Posted by JimC View Post
Actually, from what I understand 11% gray is what meters should be calibrated to use for exposure, ...
Yes, but I'll still trust an 18% gray card (or cloth) more than I would this:

Quote:
... you can use the palm of you hand for exposure, and adjust it by 1 full f-stop darker.
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Old Jan 18, 2010, 8:21 PM   #25
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It is not as good as the cloth or card, but if you forget it. It is a field solution to lock exposure. And most of us can forget a card or cloth but not to many of us can forget the palm of our hands.
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Old Jan 18, 2010, 9:36 PM   #26
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You can always paint your hand gray, and have it all.

I use a gray card I have printed myself, using black ink only option on my printer. I have seen and experienced difficulties using white card, due to a lighting situation which had a color cast, where the white card was overexposed, actually creating a color cast in the shots. Granted, I should have been more careful, but it can happen.

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Old Mar 3, 2010, 10:23 PM   #27
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Today i visited a local store to buy a grey card but there is not any of them, sales man told me that "you can use your hand for it. We do that for several years." I think it is not the best method but do you have good results from it? how good to use hand?
Printing grey card is not a good idea, because there are a lot of obsticles around you, calibration of computer, printer and the printer paper, CMYK of printer, RGB codes and later you would have 18% grey card, i couldn't be sure to have real grey card by this way and i gave up to do this. But the hand idea is really interest me much.
I don't know if my caselogic bag's grey is 18% if not i have to use hand. Because there is no grey card around here but grey panels for studios.

Last edited by imut; Mar 3, 2010 at 10:28 PM.
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Old Mar 3, 2010, 11:50 PM   #28
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You are referring to locking exposure when using the palm of you hand, not white balance. It is true you can use the palm of you hand just correct it by one full f stop.
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Old Mar 4, 2010, 8:18 AM   #29
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I read a topic on net and it is like
Quote:
histogram in conjunction with the various metering mode
can be used to get correct exposure. After my little experience, now i question the necessarity of gray or white card, because you do a lot of things with white printer paper, with white cloths, with your hand and with histogram.
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