› Forums › Sun › Makeing a white light filter for my 10″ Dobsonian › Re:Makeing a white light filter for my 10″ Dobsonian
21 May 2010 at 4:24 pm
#575287
Dominic Ford (site admin)
Participant
Posted by Callum Potter at 16:24 on 2010 May 21
Hi Paul,I would think a 3 inch diameter offset would be fine. Will make it about f/16 or so…Cheers, Callum