Thread: Distance for artificial star.
View Single Post
  #2  
Old 12-11-2013, 07:12 AM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Suiter, "Star Testing Astronomical Telescopes", p85 recommends x20 the focal length.
Reply With Quote