View Single Post
  #1  
Old 28-02-2017, 11:36 AM
Roger_L (Roger)
Registered User

Roger_L is offline
 
Join Date: Feb 2017
Location: Perth, WA
Posts: 4
What is meant by ' prime focus work' ?

Hello, all. I probably can't even call myself a newbie, because I may well not even end up buying a 'scope. But anyway, I was googling for opinions, reviews, etc of GSO mirrors and found the following thread:

http://www.iceinspace.com.au/forum/s...d.php?t=112684

Interesting, but what caught my eye was the following post, by raymo, which was sort-of OT, but pertinent to the earlier post by barx1863

"One factor to consider is that the skywatcher dobs despite their unpopular focuser and adaptor setup, are suitable for prime focus work, which is not the case with some other brands.[without either minor or major mods]. Worth checking the scope you select to see if it will reach focus, ... "

Could someone expand on the details / implications of those two posts, maybe point me to some further reading...

Thanks, Roger
Reply With Quote