Atik Cameras

Author Topic: Elongated guide stars with ATIK OAG  (Read 2848 times)

Matt_H

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Elongated guide stars with ATIK OAG
« on: March 11, 2018, 10:58:08 pm »
Hi,
I’m using the ATIK OAG with a ZWO 290MM.

My guide stars are elonagated in PHD2 whilst the stars through my main camera (490ex) are perfectly round.
PHD2 exposure length from 1 sec to 4 sec all the guide stars are elongated.
I have adjusted focus using a Bahtinov mask. I think it’s tilt in the OAG prism. As I rotate the mask there is a position where the alignment lines on the Bahitonv mask image is of equal brightness between each side of the mask. As I rotate in line with the elongation of the stars one side fades.
I notice that as I tighten the prism when I’m at the right extension length the prism “bar” moves a bit to one side.
Perhaps this is the source of the tilt?
Does anyone else who owns the ATIK OAG ever experience this? Is my OAG faulty?
I hope I’ve made myself clear....

Thnaks
Matt

vince

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Re: Elongated guide stars with ATIK OAG
« Reply #1 on: March 12, 2018, 02:08:21 pm »
Hello Matt,

Would you mind sending us an image into support@atik-cameras.com so we can have a look please.

Best regards
Vince

Matt_H

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Re: Elongated guide stars with ATIK OAG
« Reply #2 on: March 22, 2018, 08:42:45 am »
Hi Vince,
Thanks I will. Sorry for late reply.
Matt

Matt_H

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Re: Elongated guide stars with ATIK OAG
« Reply #3 on: April 16, 2018, 11:05:59 pm »
Just to close this out for anyone interested.
The elongated stars disappeared by lowering the mirror more into the imaging/light capturing area on the advise of Vince.
Problem solved.

orlahirish

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Re: Elongated guide stars with ATIK OAG
« Reply #4 on: March 18, 2019, 01:14:45 pm »
Quote
Just to close this out for anyone interested.
The elongated stars disappeared by lowering the mirror more into the imaging/light capturing area on the advise of Vince.

Luckily I am not the first one experiencing this issue and know how to sort everything out now!

http://www.letsrun.com/forum/report.php?board=1&id=8976109            
http://forums.online-sweepstakes.com/blog.php?b=5630            
https://www.goodman-games.com/forums/viewtopic.php?f=72&t=48245