Thread: Collimation on GSO f/4 newt
View Single Post
  #15  
Old 18-04-2015, 09:12 AM
glend (Glen)
Registered User

glend is offline 		 
Join Date: Jun 2013
Location: Lake Macquarie
Posts: 7,121
Secondary offset is important in 'fast' newts and it is shown well, as are the comparative differences with slower newt, in Astro-baby's instructions.
Reply With Quote