j4nu wrote:
Well said!
I guess what I'm wondering about is:
if we take 2 imaginary sensors, one with 10EV DR and the other with 8EV DR, will the former show more "tonal gradiatons" in the overlapping range
There is no "overlapping range"
The difference between the two is (qualitatively, not in the exact numerical sense) like the difference between a ruler with 1 cm between the ticks and another that has 1 mm between the ticks. The two rules have the same length (from pure black to pure white, in the photography sense) but one is (for example) 10cm long while the other is 100mm long.
This example assumes that the noise is negligible and that the ISO gain is set to match the brightest available light to the largest available number in the ADC.
Yes, I think your analogy is better than mine.
Basically, both rulers span the same range but with different number of steps.
Though, I think what makes this "photo ruler" more complex is that it might have a different number of ticks in different ranges (due to the steepness of the curve, however it's called - the one from the article explaining Sony lossy compression).
But I guess it means both yes and no to my question, which might have been improperly stated from the start ...
Sep 26, 2025 at 07:39 AM
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