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Orion64
scholastic sledgehammer


Reged: 11/29/09

Loc: Western Cape, South Africa
Re: Ready to give up on AP new [Re: SANDRO78]
      #5648488 - 01/28/13 03:27 PM

Hi alex, I think it is just a hot column caused by the tec which was turned off. When I uploaded the image onto flickr, it seemed to make the problem much worse (dont know why).

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SANDRO78
super member


Reged: 06/12/12

Loc: fr
Re: Ready to give up on AP new [Re: Orion64]
      #5648558 - 01/28/13 03:57 PM

Your problem is strange !!
Good luck !!
@lex


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neptun2
scholastic sledgehammer


Reged: 03/04/07

Loc: Bulgaria
Re: Ready to give up on AP new [Re: SANDRO78]
      #5648636 - 01/28/13 04:30 PM

Well the image looks ok now. I don't see any problem in one of the corners. Most probably it was really orthogonality problem. A friend of mine had similar problem - prolonged stars in one of the corners and in his case it was caused by sensor shift after the modification of his DSLR. When this was fixed everything was ok. in your case the focuser alignment that you did obviously fixed the problem.

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shams42
Pooh-Bah
*****

Reged: 01/05/09

Loc: Kingsport, TN
Re: Ready to give up on AP new [Re: neptun2]
      #5648978 - 01/28/13 06:57 PM

Have you tried test exposures on both sides of the meridian, etc, to make sure that the problem isn't fixed only in one orientation?

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Orion64
scholastic sledgehammer


Reged: 11/29/09

Loc: Western Cape, South Africa
Re: Ready to give up on AP new [Re: shams42]
      #5649722 - 01/29/13 05:58 AM

Quote:

Have you tried test exposures on both sides of the meridian, etc, to make sure that the problem isn't fixed only in one orientation?




This is a good point. I will test this tonight.


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morten
super member


Reged: 07/22/08

Loc: Denmark
Re: Ready to give up on AP new [Re: Orion64]
      #5652422 - 01/30/13 02:08 PM

What is the difference bewteen using a tilt aduster in the path between the reducer and the cam, and adjusting the tilt of the focuser. I guess new collimation is necessary for the latter?

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Gray
scholastic sledgehammer
*****

Reged: 01/31/11

Loc: Hixson, TN
Re: Ready to give up on AP new [Re: morten]
      #5656170 - 02/01/13 11:22 AM

Looks like you may have it figured out Brett. With $6K involved you shouldn't even think give up. Never give up. I hope all of your work pays off soon. CS

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