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HELP! I finally managed to auto-guide for the first time but I am not sure how successful considering the shape of the stars. Does anyone know what would cause this artifact on Capella. I used a 6.3 FR and a Canon T1i @ prime focus. Exp, was 40 sec. My surrounding were dark with no secondary light sources.

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Comment by Philip A Cruden on November 30, 2014 at 12:52pm

Now all I need to do is to get the guiding sorted. I am using Backyard EOS for imaging which works great and I am using PHD for Guiding but when I have them both operating the computer crashes. Odd considering the Laptop has 8gb of ram. Both pieces of software work great by themselves but together no go. I am now wondering if it may be the video card. All my cables are the latest and greatest so I know it is not that. Some more testing needed:)

Comment by Philip A Cruden on November 30, 2014 at 12:45pm

Well I finally got around to figuring this mystery out. The 6.3 Reducer works just fine as long as I have it the Crawford focuser. I bought the Focuser and the Reducer from OPT at the same time and I think the sales guy put together what I would need to make it all work. Attached is an image of Capella with the SCT8, Crawford Focuser, 6.3 Reducer and the T1i, 40 sec exposure single image.

Comment by Philip A Cruden on October 31, 2014 at 5:50pm

Thanks Marc. I will give that a try too. Thanks for the links also.

Comment by Marc Basti on October 31, 2014 at 4:43pm

The focus w/the crawford in place looks dead on perfect. Maybe (w/out craw. focuser) try taking 3 pics-on focus, little under foc, little over foc. See what that shows? Marc

Comment by Marc Basti on October 31, 2014 at 4:31pm
Comment by Philip A Cruden on October 31, 2014 at 2:14pm

Thanks Russ. I am using my Celestron SCT 8. The odd thing is that the reflections do not show up when I use the Crawford but I do not get the nice wide field with the Crawford. I read some review on the Celestron OTA's using the Antares f6.3 F/R and they were almost all 5 start out of 25 reviews. The biggest complaint was that it only came with 1 cap. I really want to get as wide a view as I can so I will keep at it and back track as much as I can which will mean re-balance and so on. Thanks Russ and I will keep you posted. BTW when you are shooting with a DSLR, what light setting do you use?

Comment by Russ Ruggles on October 31, 2014 at 1:22pm

OK.

Yes I can see that reflection ring. It could be the strong light reflecting off of the secondary (assuming you're using the SCT) and I see those odd reflection lines running through the star as well. I think you're closer to narrowing it down to the cause.

Comment by Philip A Cruden on October 31, 2014 at 1:12pm

I am going to try a few other things tonight and see what happens

Comment by Philip A Cruden on October 31, 2014 at 1:11pm

Hey Russ, The reflections are still there in the image on the lower right.

Comment by Russ Ruggles on October 31, 2014 at 12:55pm

Well the crazy reflects seem to be gone. The one without the focuser has an odd ring but that could be anything.

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