KLO82
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Senior Member
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Posts: 1,527
Re: Noise Reduction at Low ISO
bclaff wrote:
johnpul wrote:
Bill you are the man. Thank you for all that you do. Photonstophotos is such a great resource.
The dynamic range of the R6ii looks solid and truly competitive with Sony offerings.
Can you explain whether the "triangle down - noise reduction" markers for sub 3200 ISOs is a bad thing?
I see that the Sony A74 for example... has similar values but only circles.
Does this mean the Canon sensor is sacrificing some detail to hit these dynamic range figures?
My untechnical mind is surprised there would be noise reduction going on at iso 100.
Noise Reduction (NR) at low ISO settings has become more common with certain brands in recent years. NR does result is some loss of detail but I have no truly objective way of measuring that. I'm working on it. Personally I would prefer to have complete control over how I apply NR so I would prefer that I could disable this behavior. Strangely enough it is not applied when Electronic Shutter (ES) is invoked. (As I was writing this I realized that my software wrongly put the triangles on the ES data and I have just fixed that.)
One way to judge the amount is to look at the energy spectra.
R6 Mark II
R6
R6 Mark II (ES)
The stronger the NR the deeper the dip. Flat is no NR.
From my understanding (and I may be wrong), Canon use raw NR to only those cameras for which they allow to use Auto Lighting Optimizer (ALO) [intelligent brightening of shadows] with HEIF. They are not applying raw NR to R6II's e-shutter mode because they do not allow HEIF from those 12 bit files (someone who owns R6II can confirm if I'm correct about not allowing HEIF output from e-shutter mode).