+Ibbo Posted February 5, 2012 Share Posted February 5, 2012 This is a galaxy I visit year after year and I've never been happy with the image This time the CCD cover slip was covered in dust from dew forming on the coverslip 23 x 600s with the SXh9 and the WO132 showing the pinched optics nicely as the temp drops Link to comment Share on other sites More sharing options...
Daz Type-R Posted February 5, 2012 Share Posted February 5, 2012 Fantastic shot there Steve, very nice. Link to comment Share on other sites More sharing options...
catman161 Posted February 5, 2012 Share Posted February 5, 2012 Again absolutely awesome Steve, great job Link to comment Share on other sites More sharing options...
Brantuk Posted February 5, 2012 Share Posted February 5, 2012 Good pic Steve - I take it the slightly splurged stars are caused by the "pinching". Would that be right? I allways wondered how it manifests itself. Link to comment Share on other sites More sharing options...
Doc Posted February 5, 2012 Share Posted February 5, 2012 I ddin't know also Kim, so pinched optics and a temperature drop does this. Great photo as always Steve. Link to comment Share on other sites More sharing options...
Rusty Strings Posted February 5, 2012 Share Posted February 5, 2012 Please explain pinched optics on a refractor Still a crackin' shot Steve Link to comment Share on other sites More sharing options...
philjay Posted February 5, 2012 Share Posted February 5, 2012 Good image Steve. Thats exactly the same diffraction pattern that I used to get in my Orion USA 102ED doublet.That used to do the same in cold weather. at the time there was lots of questions on WO, Stellavue etc forums about it. Phil Link to comment Share on other sites More sharing options...
+Ibbo Posted February 6, 2012 Author Share Posted February 6, 2012 I think I'm going to swap back to the Tak 102 for CCD and DSLR with the WO Link to comment Share on other sites More sharing options...
Guest NadeemShah Posted February 6, 2012 Share Posted February 6, 2012 I was imaging this the other night, but was interrupted by finding out the focuser on the quattro was not squarely fitted... Link to comment Share on other sites More sharing options...
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