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About Bibabutzemann

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  1. Thanks for all your helpful replies! I finally really took time to sort out the source of the problem (on a bright moon night), so im prepared for the big summer targets There were two main steps that solved the issue: Step 1: Better collimation: After doing laser collimation, i continued to do some finer adjustments with star collimation and the dslr: 1a) I used a bright star in the middle for faster focusing with the Bathinov mask. Then i made short exposures to see in which corner the stars were stretched the most 1b) Then in liveview i collimated the primar
  2. Unfortunately it was very rainy for the last few days here in Germany... Today i had only 15 minutes for testing and it wasnt very accurate, so i will try properly before posting any results. But one thing i immediatly noticed is that you have to be careful with refocusing when you change the distances. Because when youre slightly out of focus, you also get strong distortions in the corners. So be sure to use a Bahtinov mask and take your time.
  3. Thank you so much for your replies! If the graph from the link is correct, the mpcc is too close to the sensor.(if it would be too far, i would have to buy a thinner T2 Adapter) I think i will try different distances by unscrewing the corrector a tiny bit. If i get better results i may buy an old camera filter to fix it, thanks edarter. Will post any results here. CS Patrick
  4. Hello, i just recently got my 130 PDS and a Baader MPCC3. I use a EOS1200Da for imaging. My problem is, that i get stretched stars on the edges. Here an example, the heart nebula (unfinished, only 2 hours exposure time) Looks pretty bad to me. I read a few other threads on this topic and as far as i understand, the spacing between corrector and chip should be 55mm, which is achieved by using a common T2 adapter for EOS. So spacing shouldnt be the cause of the problem, right? Any ideas? Collimination should be about right, i used the barlow method with a laser.
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