In doing research on in-camera histograms, I have found repeated assertions that the luminance histogram is the same as the green channel histogram, color science to the contrary (the only RGB color space in which colorimetric luminance is the same as the green channel would have to have three identical primaries, all of them the… [Read More]
Testing for ETTR, part 11
I have a D3x modified by LifePixel with the so-called “Deep IR” filter. I attempted to get the in-camera histogram to look like the real raw histogram. I achieved only partial success. With the camera now so IR-sensitive in all three channels (the red, green, and blue filters that form the Bayer pattern on the… [Read More]
Raw histogram approximation — why bother?
A few people have questioned why I’m going to all this trouble to find out how to approximate the real raw histogram. Why not just accept the extra safety margin that the camera gives with a normal JPEG preview image? I dealt with some of that here. Here’s a salient excerpt: …if a full frame… [Read More]
Reproducible results
From a reader: Always good to test for one’s self, but it has been known for a long time that RAW is just that….unprocessed raw data from the sensor (though many suspect Nikon does do some manipulation….different philosophy from Canon). RGB mode will change the look of your histogram, so consistency is important. Certain camera… [Read More]
What color space settings for raw?
The Nikon cameras that I’ve used give you a choice of two color spaces: sRGB and Adobe RGB. If you’re shooting raw, does it make any difference which you pick? I figured not, but I always picked Adobe RGB just in case. Today I decided to do an experiment to confirm or deny my assumption…. [Read More]
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