Re: Using a 113 gray standard in digital photo (Andy)
Re: Using a 113 gray standard in digital photo (Andy)
- Subject: Re: Using a 113 gray standard in digital photo (Andy)
- From: "Franz, Karin" <email@hidden>
- Date: Wed, 20 Dec 2000 08:11:22 -0500
Re: Using a 113 gray standard in digital photo (Andy)> >
Andy,
Many photographers use a grey card (or Macbeth in this case--either will
work) when working with a film camera to shoot an object. If the internal
camera meter reads the exposure from the object then yes, it is best to over
expose for for dark subjects and under for a white objects. But most
professional studio photographers will meter off a standard 18% grey to get
the most accurate exposure reading. This is the proper exposure no matter
what the color of the object, it simply is measuring the amount of light in
the scene which is the key factor here. So you see this is not so crazy now
that there is a digital camera involved. It works the same way. And by using
the grey card the image can be grey-balanced to a proper neutral.
Remember that each time you change the lighting scenario the exposure will
have to be verified. If you only change the object, the exposure is the
same.
Karin
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Message: 2
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From: "Andy" <email@hidden>
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To: <email@hidden>
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Subject: Using a 113 gray standard in digital photo
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Date: Tue, 19 Dec 2000 11:45:42 -0500
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Hello to the group
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I have a pre-press production guy asking me to expose all my digital
images using a Macbeth chart and adjusting my exposure so that the 3rd gray
patch reads 113. He tells me that this allows his color guys to correct
color without actually looking at the items in the shot. Am I crazy in
thinking this is nonsense? As with film, a good exposure is one that
provides the most detail in the item being shot. If an item is white, a
slightly darker exposure yeilds an image with detail. With a black item, the
opposite is true. So how can I use only one exposure (the one that renders
the 113 gray) for all items?
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Thanks in advance
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Andy