View Single Post
  #3  
Old 25-09-2017, 08:26 PM
astronobob's Avatar
astronobob (Bob)
Casual Cosmos Capturer

astronobob is offline
 
Join Date: Jun 2010
Location: Gold Coast SE QLD
Posts: 4,488
Hi Andy, the C8 alone is naturally F/10, & F/L 2000mm
With Hyperstar combo , = F/2, @ F/L 400m .

Edit, correct : is F/2.1 = 425mm

Last edited by astronobob; 25-09-2017 at 10:30 PM.