m37 Posted January 6, 2014 Share Posted January 6, 2014 HiWould anyone be able to have a look at this picture and tell me why I'm getting long stars in some bits and not in others? It is a composite of the extreme edges and corners.Looks to me like the centre is OK.Top middle looks OKBottom middle looks like the stars are veering off to approx 5 o'clock positionWhole right hand side also veering off to 5 o'clock positionwhole left side looks like it is going off in the opposite direction.I have the WO GT-81 with the WO FR6 (0.8x)into the provided T-Adapter which attaches to a Canon EOS1000Dcheers Link to comment Share on other sites More sharing options...
Steve 1962 Posted January 6, 2014 Share Posted January 6, 2014 You have a PM Link to comment Share on other sites More sharing options...
Steve 1962 Posted January 6, 2014 Share Posted January 6, 2014 I've run the image through CCD Inspector and come up with the following:I'm by no means an expert, but it looks to me that your sensor is pretty well bang on with your focal plane, but the flattener is slightly over correcting.I'll watch with interest to see what other views you get.Hope this helps.Steve Link to comment Share on other sites More sharing options...
m37 Posted January 6, 2014 Author Share Posted January 6, 2014 Cheers for that mate, much appreciated. Link to comment Share on other sites More sharing options...
ollypenrice Posted January 6, 2014 Share Posted January 6, 2014 Chip distance? Tilt in the focuser or, less likely, in the camera?Olly Link to comment Share on other sites More sharing options...
m37 Posted January 6, 2014 Author Share Posted January 6, 2014 Chip distance? Tilt in the focuser or, less likely, in the camera?OllyThanks for those possible thingies. Chip distance is spot on the recommended +/- about .5 mm. Tried a different camera, same problem. I think you might be right on the money with the focuser. Just found that as well as the two thumb screws in the drawtube there is also a black nylon grub screw. I'm thinking if I have a play with these then I should be able to get everything centred. Cheers againChris Link to comment Share on other sites More sharing options...
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