Guest David Pugh Posted January 2, 2012 Share Posted January 2, 2012 When focusing using a particular setup i.e. ep, barlows, ccd etc. Are you adjusting the focus to match the setup and then everything you look at will be in focus? i.e. planets, nebulas etc. or do you need to adjust the focus for every subject? Link to comment Share on other sites More sharing options...
Brantuk Posted January 2, 2012 Share Posted January 2, 2012 Hi David - you'll need to adjust the focus for most every eyepiece change and barlow setup - it's standard procedure Link to comment Share on other sites More sharing options...
Doc Posted January 2, 2012 Share Posted January 2, 2012 Unless your eyepieces are parfocal. Link to comment Share on other sites More sharing options...
Brantuk Posted January 2, 2012 Share Posted January 2, 2012 I was gonna put that but just couldn't think of the word - must be getting senile lol Link to comment Share on other sites More sharing options...
Doc Posted January 2, 2012 Share Posted January 2, 2012 I was gonna put that but just couldn't think of the word - must be getting senile lol Link to comment Share on other sites More sharing options...
BAZ Posted January 2, 2012 Share Posted January 2, 2012 If you are imaging then have a look at a Bahtinov mask, these let you precisely obtain focus. They won't break the bank either, and if you are a bit handy, can be made DIY style. http://en.wikipedia.org/wiki/Bahtinov_mask I would imagine they would be useful for visual as well. Link to comment Share on other sites More sharing options...
Guest David Pugh Posted January 2, 2012 Share Posted January 2, 2012 Thanks. Link to comment Share on other sites More sharing options...
glider Posted January 2, 2012 Share Posted January 2, 2012 Yeah, make yourself a Bahtinov. Focus on a nice bright star and then unless you change EP, barlow, etc everything else should also be in focus. If you do change EP you may need to refocus, or use parfocal optics, or get some parfocal rings. Link to comment Share on other sites More sharing options...
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