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Forum: Pentax K-1 & K-1 II
08-11-2018, 10:24 AM
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So, as others have mentioned, if you have long shutter noise reduction enabled (I think it is by default on my cameras, but I don't have the K-1) and you take a 20s exposure, after 20s, you should hear the shutter close, then the camera will be totally unresponsive for 20s longer, then, in my case with the KP, the activity light flashes as the image is recorded. I also see a progress bar on the display, in cases where I have something like clarity enhancement turned on.
I believe the benefit of doing the long shutter NR in camera is that it is able to look at what the noise on *your* sensor looks like after being active for 20s (for example), at the ambient temperature and internal camera temperature at the time and place where *you* are shooting. As far as whether or not this is "better" at NR than various post-processing tools, I don't have enough experience to say.
You could always try taking the same exposures with and without long shutter NR turned on and compare them to each other, and then to what you can do in post.
FWIW, I recently spend 90 minutes out at the lake on vacation doing some astrotracer shots and those extra 20 or 30s during the NR felt like an eternity while I was standing on tired legs, underdressed for the cold 😑
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