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Pompey Monkey

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About Pompey Monkey

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    Proto Star
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  • Interests
    Astronomy, cycling, science.
  • Location
    Hampshire, UK

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  1. The best, by far and away, noise reduction method for DSLR imaging is to dither between exposures and then use a statistical rejection algorithm to disregard the outlier pixels in the stack. There are many algorithms that do this, but most people just call it "sigma" rejection.
  2. Have you got the auto noise correction on in the camera settings? This takes a second exposure of the same duration as the picture but with the shutter closed, to correct for noise on the sensor.
  3. Excellent first image. Well done! 😀
  4. Good question! I'm not sure if SCNR on the green channel completely wipes out my green data, but let's hear what the experts have to say....
  5. Could be. I thought it was light pollution. Just goes to show what I "expect" to see in images of the night sky
  6. Stacking, dithering and drizzling are used: There might not be atmospheric distrotion or light pollution in space, but there are plenty of sources of noise...
  7. Good link. Shame the Beeb can't tell the difference between the Magenellic Clouds and aurora though.
  8. After Olly told me that he usually only takes luminance flats, I tried that too. Works a treat for me
  9. Welcome to SGL!
  10. Doesn't look to shabby. I'd ditch the barlow if I were you: It just adds an extra complication to the mix and you'd be surprised at how good PHD is at determining the centroid of the guide star, even at pixel scales much bigger than yours.
  11. Gonna look at the PDF, but have bought the book from Amazon too. <smug>
  12. South Downs you say?
  13. Get your request in to the council to block any direct illumination of your property before it happens - it is much easier (and cheaper) for them to include this kind of request at the planning stage. Use this leaflet as ammunition if necessary.
  14. You mention both PI and DSS in your post: How do you calibrate the subs? What is the exact method that you used to calibrate your subs? How does a single calibrated sub look?