Guiding, OAG, Beamsplitters, and Flip Mirrors

  • Ken M. Harrison
Part of the Patrick Moore's Practical Astronomy Series book series (PATRICKMOORE)


You’ll quickly find it’s a challenge to get a star focused on the spectroscope slit and hold it there during a series of 5-min exposures!


Microwave Acetone 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Ken M. Harrison
    • 1
  1. 1.CobhamUK

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