Re: Using a 113 gray standard in digital photo
Re: Using a 113 gray standard in digital photo
- Subject: Re: Using a 113 gray standard in digital photo
- From: "Terence L. Wyse" <email@hidden>
- Date: Thu, 21 Dec 2000 21:17:25 -0500
on 12/21/00 8:18 PM, richardkenward at email@hidden wrote:
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Anyone who thinks this is not so should just consider this scenario.... Old
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master oil painting....dark sombre colours. If the 18% grey card expose
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method as used the resultant transparency would be totally unusable to the
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extent that it would very likely be in the region of 11/2 stops underexposed
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(much too dark) whereas the picture of a white wedding dress under the
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same conditions would be far too light. (overexposed)
Not over/underexposed, just beyond the luminance/dynamic range of the film
in question. What of a painting of a white wedding dress in a background of
dark somber tones? What then?
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Another point for the non photographers to ponder. Why do you think that
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professional camera metering systems take readings through the lens system
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from many places in the picture area?
Because there's not likely a gray card present in the photo! So they have to
sample several areas to get an idea of the luminance range and sort of guess
at the exposure "placement" of the standard 18% gray.
TW