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> How to make an 18% Grey Card |
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#11
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You should use white i.e. paper base as your 0 stop reference; "black" will be dependent on the maximum density (Dmax) of the paper. Matt papers have a lower Dmax than gloss. The only way to be certain your grey card is the correct density is to use a densitometer to measure its reflection density which should be around 0.74 according to Kodak.
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#12
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Last edited by Argentum; 25th November 2014 at 02:38 PM. |
#13
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It's not required, but it can be useful.
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#14
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Bests, David. www.dsallen.de
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David, d.s.allen, fotograf dsallenberlin@gmail.com http://dsallen.carpentier-galerie.de |
#15
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It's worse than that, the angle of the card to the primary light source and the camera have to be exactly to the defined angles as detailed in the usage instructions otherwise it doesn't reflect 18% to the meter. You would need a sextant to set it correctly. And then as discussed in another thread, it doesn't represent the middle of anything except a 5 stop range and will usually result in under exposure when using black and white film unless you've calibrated your exposure and development to a grey card.
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#16
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Thanks |
#17
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#18
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Thanks!
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#19
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Steve. |
#20
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