Thread
:
First light - test shots QHY9 mono.
View Single Post
#
6
02-09-2012, 12:56 PM
Peter.M
Registered User
Join Date: Sep 2011
Location: Adelaide
Posts: 968
The donuts are from dust in the optical path. Flats usually take care of them pretty well.
Peter.M
View Public Profile
Find all posts by Peter.M