Some Technical Details on the Canon EOS R5 Low ISO Noise Reduction

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bclaff Forum Pro • Posts: 10,122
Some Technical Details on the Canon EOS R5 Low ISO Noise Reduction

So, bear with me, this chart is a bit dense ...

Best viewed "original size"

1) The red dot at 7 on the x-axis is ISO 400 and it's below the blue dotted line which immediately appears to be Noise Reduction (NR).

2) The red dots at 5 and 6 on the x-axis, ISO 100 and ISO 200, have a slope greater than 1; definitely NR at ISO 100 and perhaps at ISO 200.

3) The squares are 2-Dimensional Fourier Transforms (2D FTs) at 100% from the center of black frames. They should be fairly random.
They are shown from top to bottom, left to right, is ISO order.
So the 1st and 3rd, ISO 100 and ISO 400, show very clear NR.
While ISO 200 shows only a little and ISO 800 practically none.

Based on my experience with quite a few cameras I estimate the the NR gives ISO 100 and ISO 400 about 2/3 stop improvement in Photographic Dynamic Range (PDR).

NR always comes with loss of detail; whether that loss is visible is hard to say.

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Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

Canon EOS R5
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