There is a debate about whether turning off NR on the Panasonic DMR-ES15 completely turns it off, or merely sets it to a lower setting. I decided to conduct a test.
Setup: in the ES15 menu settings (Other Functions - Setup - Video - Black Control Level) I set Input to Lighter, Output to Darker, which is the recommendation from all as it gives least banding (posterization).
Workflow: Sony TVR66 High8 camcorder (from 8mm tape source) > Panasonic ES15 > Diamond VC500 > Windows10 > VirtualDub1911 with Huffyuv
v2.1.1. I did the pre-crop, turned on histogram, set the levels, uncropped, captured. No filters applied. Combined files side-by-side in VirtualDub2, saved as Huffyuv
v2.1.1. Then converted to H.264 for the upload here.
I'm not sure if this scene is the proper test environment. To my untrained eye, I can't see a difference between the On and Off. Right side = NR ON; Left side = NR OFF.