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Brightness value in LR

Muizen

Active Member
Joined
Aug 24, 2011
Messages
148
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Mechelen, Belgium
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I would like to understand the importance of the "brightness value" information presented in LR Library Exif data.
It must be there to serve a purpose?
 

Muizen

Active Member
Joined
Aug 24, 2011
Messages
148
Location
Mechelen, Belgium
Lightroom Experience
Intermediate
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This is the value of the Exif field "Brightness" or "BrightnessValue". It represents the camera's assessment of scene brightness in APEX units. There's a very brief explanation in Appendix C of the Exif 2.3 specification.
Thank you Mark for your information.
However I would like to understand what I as a photo amateur, can do with this information?
There must be a purpose for listing this brightness value in the Exif data?
 

Mark Sirota

Senior Member
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Oct 8, 2007
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Location
Philadelphia, PA, USA
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Power User
One of the examples given in the Exif specification is that you can tell whether the photo was shot in darkness, and therefore look for noise that you might wish to correct in post. But you can tell that yourself from the ISO/aperture/exposure time triad, so I'm not sure it's of any real additional value.
 
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