Dr. Robin Glover on digital imaging

For those interested in imaging and image processing with DSLR, CCD, webcam or film.
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rwilkinson
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Dr. Robin Glover on digital imaging

Post by rwilkinson » Fri Jun 21, 2019 1:30 pm

At the recent Practical Astronomy Show 2019, Dr. Robin Glover (a physicist and software developer who created the SharpCap program) gave a 50-minute talk about the niceties of long-exposure digital imaging, particularly with modern CMOS microlens sensors:
https://www.youtube.com/watch?v=3RH93UvP358

He explains the differences between CCD and CMOS sensors and the contibutions of noise compared to the background light-pollution levels. He presents very clear explanations of how single-frame-noise varies with exposure length, and how stacking improves the signal-to-noise ratio by the square-root of the number of frames stacked.
Then he combines these factors into an equation to calculate the optimum length of sub-exposures for a given total imaging time.
Unfortunately he runs out of time at the end, and has to hurry through his conclusions.

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