Thanks for the recommendation; the gap between the different cameras I compared (e.g. the 40D which is similar to mine and the 90D) was not as large as I was expecting.
You’re right, both are underexposed:
sky_noise:
water_noise:
In fact, here’s the histogram and visible noise before any adjustments:
And after increasing the exposure:
When compared to another photo taken from that same day where the histogram is much more evenly distributed to begin with (below), the difference is pretty obvious; I do NOT see the same kind of noise in the sky in this shot:
So likely the noise will be worse (or more visible) if underexposed?
@kofa good idea but defringe didn’t seem to help in this case.
That makes sense, but what doesn’t seem intuitive to me is that the variation would include obvious patches of red and green; I would expect variations of blue but not these other colors:
However the color picker says this is actually really blue, so maybe it’s just an illusion I see when looking at the image on the screen:
