larryepage wrote:
The menu offers two options...Long Exposure Noise Reduction and High ISO Noise Reduction. They are in the Shooting Menu of the D500, D810, and D850. Not sure how to access them in other cameras. Long Exposure Noise Reduction works by taking an additional exposure after your exposure is completed, but does not open the shutter. It is of the same length as your intended exposure and seeks to identify any pixels that get hot or otherwise generate noise during the exposure, then "subtract" those pixels from the original exposure. Using it doubles the exposure time, so is not always practical, like when taking panorama shots of the Milky Way. High ISO noise reduction algorithmically seeks to process noise out of each exposure. It takes a small amount of extra time, and the amount of noise reduction is adjustable via the menu. In my opinion, it works pretty well and can be superior to removing noise later in post processing. Removing noise in PP is, of course, also a very viable option. Even with a D810 or D850, some sort of noise reduction is going to be necessary in extreme cases for best results. I prefer to use a mix, and am still working to define what my ideal "recipe" will be. My preference is to minimize time and work in post processing, so that's what I generally try to work for.
The menu offers two options...Long Exposure Noise ... (
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I may have missed that setting - I'll have to get back in to the menu and look. I know the long exposure won't work for me, though the other one might help matters.