Astrophotography Skills – Autoguiding

Page not written yet.

Outline of what it will contain:

  • Intro
    • Point to article on options
    • Assume already installed and practiced
  • Find a suitable guide star
    • Objectives
      • Good guide star in guider frame
      • No other similar stars in guider frame
      • Good main image composition
    • May need to adjust and iterate
      • Rotate camera
      • Rotate guider
      • Re-point separate guide scope
  • Calibrate autoguider
    • What’s involved
    • When do you need to re-do it?
  • Set guiding parameters
    • Objectives
      • Correct errors quickly
      • Don’t over-correct (causing oscillation)
      • Don’t “chase seeing”
    • Which parameters
      • Length of guide camera exposure
      • Delay between guide camera exposures
      • Minimum and maximum moves
      • Agressiveness
    • Calculator
    • Special mention: dithering
      • What is it
      • Why do it
      • Effect is between main camera exposures
      • Requires guiding integrated with exposure management
        • integrated s/w like TheSky or Maxim
        • guiding that the exposure manager is unaware of, like PhD used with manual exposure on a DSLR, can’t be used for dithering
      • Settling parameters
  • Start guiding
    • Wait for it to settle
    • Ready to go
  • keep an eye on it while running
    • Normal drift
    • Sudden jumps
    • “lost guide star”
    • inter-exposure dithering

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