Sirius region- electronic shutter vs mechanical shutter with dark frame subtraction comparison

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OutsideTheMatrix
OutsideTheMatrix Senior Member • Posts: 7,460
Sirius region- electronic shutter vs mechanical shutter with dark frame subtraction comparison

these are images around Sirius (very useful star for re-centering since it's so bright!) I did one using the electronic shutter and one using the mechanical shutter with automatic dark frame subtraction (the electronic shutter one solely relied on the best pixels feature which works very well for me now.) I'm interested in your opinion of image quality using the electronic shutter vs the mechanical shutter. The images are both 50 image stacks at 75mm (150mm EFL), f/4.8 and 3.2 second exposures and ISO 3200. I used Sequator to align and stack and selected star enhance and autobrightness.

First up is the electronic shutter image

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In the councils of government, we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the military industrial complex. The potential for the disastrous rise of misplaced power exists and will persist. We must never let the weight of this combination endanger our liberties or democratic processes. We should take nothing for granted. Only an alert and knowledgeable citizenry can compel the proper meshing of the huge industrial and military machinery of defense with our peaceful methods and goals, so that security and liberty may prosper together.
-Dwight D. Eisenhower, 1961

 OutsideTheMatrix's gear list:OutsideTheMatrix's gear list
Nikon Coolpix P900 Olympus PEN E-PL6 Olympus OM-D E-M10 II Olympus M.Zuiko Digital 14-42mm 1:3.5-5.6 II R Olympus M.Zuiko ED 75-300mm 1:4.8-6.7 II +9 more
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