Canon Long Exposure Noise Reduction (LENR) is generally considered too time consuming for AP. If you take a 60" sub, then you have to wait another 60" for the camera to shoot a dark and subtract it from the real image. It works well, but you lose 50% of your time. So of course people shoot darks at some other time and process that way.
My 6D and 7D Mark II (and many other FF Canon cameras) have a nifty feature where if your shoot exactly four images (back to back, 1 sec between images) then wait, the camera will take a single dark and subtract it from the previous 4 images. You do lose 20% of your time (not 50%) and in return you get dark subtraction with closely matched dark and image temperatures.
I have tried this, but have never done a rigorous analysis to see how LENR works compared with shooting a dark library on a cloudy night at the same temperature.
Does anyone here use LENR for DSLR AP?
Scientific stuff: the LENR dark will have plenty of shot noise, because it is a single sub and not smoothed like a stack of 32 darks would be. But the LENR dark would have all the hot and dead pixels accurately corrected.
I have never had the patience for shooting darks with a DSLR. I now have a cooled camera which is a whole different story. But for travel I think I will use a DSLR.
I have used the "sensor clean, clean now" in conjunction with Adobe Raw Conversion method of killing hot pixels. It works great, but I don't know what it does for other types of noise.
Edited by t-ara-fan, 24 June 2019 - 06:40 PM.