Madman wrote:
No, using the in camera noise reduction does not change the file to a JPEG. Just like selecting color balance does not change the file to a JPEG.
What you need to do is your own testing to form your own conclusion. Those two photos that I posted were hand held, not easy for me at that distance (over 400 feet). I should have set the camera on a tripod to be sure that there was no movement and the same focus/composition on both images.
Do you shoot in RAW? Or are you refering to noise reduction when you shoot in RAW? Or are you referring to using noise reduction when you shoot in jpeg? I am certain but could be wrong that NR does not apply to a RAW file for your 7100. Thanks for your original post as it has sparked some nice conversation here-:)