Saturn imaging

For those interested in imaging and image processing with DSLR, CCD, webcam or film.
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rwilkinson
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Saturn imaging

#1 Post by rwilkinson » Wed Apr 06, 2011 7:29 am

My most recent picture of Saturn was captured on Sun-3-Apr using a humble Philips SPC880 webcam (and an 8" SCT!).
Now as the planet is low in the sky, we see it through a thick layer of our atmosphere, which adds more turbulence and dispersion (colour-splitting), as can be seen from a still from my video stream:
videostill.jpg
A still from my video sequence (the original was 640x480 pixels)
videostill.jpg (26.62 KiB) Viewed 2956 times
But we can mitigate these effects by taking a large number (300 in this case) of short exposures (1/25-sec) and processing them in RegiStax (or IRIS), to yield a surprisingly clear image:
saturn37.jpg
Final image processed from the best 250 frames of my video (note I've rotated the image too, so that South is at the top)
saturn37.jpg (7.74 KiB) Viewed 2956 times
Now Keith and I will be demonstrating how this is done during our presentation at the 3-May meeting...

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