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Artificial Star for Collimation

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#1 gravy11

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Posted 05 July 2020 - 08:19 AM

Hey everyone! Reaching out to my knowledge crew here. Last night, I tried collimating for the first time and it was ridiculous. I had to use stars other than Polaris due to clouds. Needless to say, I should’ve waited. Anyway, now my scope is out of collimation. I need help. I’d like to create an artificial star as opposed to dropping $100. How to make one is easy. It’s putting it into play that has me flummoxed (love that word).

 

I have a Celestron 6SE. Can someone please tell me how far it has to be and how to go about using it for collimation? It’s how to set it up that has me fumbling a bit. Having my scope out of collimation is really bugging me. I’m mad I didn’t wait for Polaris and the next few days are supposed to be cloudy.
 

Help!

 

Thanks!

 

Dan



#2 deepwoods1

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Posted 05 July 2020 - 08:23 AM

Hubble’s are around $25. Go get a ball bearing as it will be clear for the next few days. 



#3 Pinbout

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Posted 05 July 2020 - 08:27 AM

at least 100'

 

i just use cars several 100' away

 

https://www.youtube....h?v=J6GUbBLXx70

 

or

 

https://www.youtube....h?v=nrjiKN82GRk


Edited by Pinbout, 05 July 2020 - 08:28 AM.

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#4 descott12

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Posted 05 July 2020 - 09:05 AM

I recently went thru a similar experience and learned alot in the process. This may help

https://www.cloudyni...on-help-please/

 

Especially the part about collimating during the day


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#5 gravy11

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Posted 05 July 2020 - 10:44 AM

So I took a stab at an artificial start and was able to get my scope from a Cat’s Eye to a nice donut (see pic). Looking for feedback. I still have it set up for adjustments so please let me know what you think. Thanks.

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#6 Pinbout

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Posted 05 July 2020 - 10:46 AM

nice picture



#7 deepwoods1

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Posted 05 July 2020 - 10:48 AM

Still not perfectly centered. Work on it more as you bring it to focus. It will make a difference.



#8 Pinbout

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Posted 05 July 2020 - 10:49 AM

So I took a stab at an artificial start and was able to get my scope from a Cat’s Eye to a nice donut (see pic). Looking for feedback. I still have it set up for adjustments so please let me know what you think. Thanks.

but your suppose to compare inside and outside to see if its centered... one image isnt enough... tongue2.gif


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#9 Pinbout

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Posted 05 July 2020 - 10:50 AM

Still not perfectly centered. Work on it more as you bring it to focus. It will make a difference.

inside / outside focus, switch them quickly, the motion will make it stand out.

 

star test.gif


Edited by Pinbout, 05 July 2020 - 11:04 AM.

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#10 davidc135

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Posted 05 July 2020 - 10:52 AM

So I took a stab at an artificial start and was able to get my scope from a Cat’s Eye to a nice donut (see pic). Looking for feedback. I still have it set up for adjustments so please let me know what you think. Thanks.

Can you take a photo at focus? The diffraction rings might be hard to capture. David


Edited by davidc135, 05 July 2020 - 10:53 AM.


#11 gravy11

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Posted 05 July 2020 - 11:06 AM

inside / outside focus, switch them quickly, the motion will make it stand out.

Quick answers...Thanks everyone. I’m new so I may be wrong on a few things:

 

1) The quick in and out focus was a nice tip. I tweaked it again and now it looks solid. I’ll take a pic later. My Wife was starting to give me the “eye”.

 

2) I thought the pinhole cap didn’t work for SCT’s? I used that method for my Reflector. Again, I may be wrong.

 

3) Hopefully going to be able to test it out tonight. Last night was a bust with my Collimation Devastation. ‍♂
 

Thx again everyone. I’ll check back once I bring it out. 
 

Dan


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#12 deepwoods1

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Posted 05 July 2020 - 11:17 AM

Noooooo, not the “eye”! Good luck!


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