Thread: f/4.7 dob eyepiece for planets
View Single Post
  #3  
Old 16-02-2017, 09:16 AM
Wavytone
Registered User

Wavytone is offline 		 
Join Date: Jul 2008
Location: Killara, Sydney
Posts: 4,147
Linton there's a general rule - fewer glass elements are better than more. In this case a short eyepiece works better than a similar but longer one + barlow.

You'd do best with one around 4-5 mm.
Reply With Quote