This one would normally go in the birds thread but it is an example of "noise reduction" using DPP4 for RAW conversion

This was shot with the 7MKII + 100-400mm Version II + 1.4 TC @ 420mm and ISO 2500 which (I think most would agree) is quite high for the 7DII

The Luminance noise reduction slider was set at 6.0 and the Chrominance noise reduction slider at 5.0

These are not heavy settings by any means. I used no additional post processing in PP, no other sharpening or noise reduction, nothing.

There is noise if you pixel peep but for web presentation it is not a factor. For a large print it well could be.