Real shutter speed - RAW Shooting and Processing - CHDK Forum
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Real shutter speed

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Offline snorkyller

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Real shutter speed
« on: 17 / January / 2013, 19:18:14 »
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When you use CHDK, you can't use the Exif metadatas, they can't be wrong. So, is it possible to know the real shutter speed value from a .DNG file?  (If not, all I can do is to write it on a paper when I take the photo).
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Offline reyalp

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Re: Real shutter speed
« Reply #1 on: 17 / January / 2013, 23:27:07 »
Quote from: snorkyller on 17 / January / 2013, 19:18:14
When you use CHDK, you can't use the Exif metadatas, they can't be wrong.
Exif *may* be wrong, but it should be consistently right or wrong. So if you verify that it is correct on your camera in a particular shooting mode, you can rely on it.

Also, there is standard exif and canon "maker note". The "maker note" is more likely to be accurate.
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So, is it possible to know the real shutter speed value from a .DNG file?  (If not, all I can do is to write it on a paper when I take the photo).
The DNG exif should record the override that value that CHDK set.
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