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: "Isaacs, Jeff" <email@hidden>
- Date: Wed, 27 Dec 2000 15:19:09 -0500
- Organization: Associated Press Broadcast News Center
John Gnaegy wrote:
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Absolutely, I didn't mean to suggest that the bracket should always be
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pinned to the edges of the histogram. I just meant it would be a useful
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kind of feedback to have when you're setting exposure. Wouldn't that be
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cool? You look though the lens and there's a little bar histogram with
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say 64 steps that updates as you swing the lens around, and to the side
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two tick marks indicating the brightest bright and the darkest dark
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capable of being registered on your film or CCD, and the tick marks
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shift as you change exposure time, f stop and film speed. It'd have to
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be dependant on film stock too.
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---
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John Gnaegy
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colorsync testing, colorsync user list
You get that, to some extent, with a lot of the studio digital camera
backs. Exposure and contrast range are often set with a curve superimposed
on a histogram, so you can see pretty easily how much of the dynamic range
of the CCD your subject is using. It's also good feedback to tell you when
you need to control your highlights, through lighting or exposure, to make
sure nothing's getting blown out - much like shooting transparencies.
It's usually not real-time, unfortunately, since these backs are most often
used with strobe. The only 'live' information you get is a focusing image.
- Jeff