Strange result in Autodev

Questions and answers about processing in StarTools and how to accomplish certain tasks.
elpajare
Posts: 147
Joined: Tue Jun 12, 2018 6:13 pm

Strange result in Autodev

Post by elpajare »

Errores foto Clouzot.png
Errores foto Clouzot.png (284.84 KiB) Viewed 4756 times
What do you think may be due to this curious shape of the image after using Autodev?
Burly
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Joined: Mon Aug 31, 2015 7:06 am
Location: Northamptonshie uk

Re: Strange result in Autodev

Post by Burly »

It could be walking noise , what was acquisition details / setup are you guiding , dithering, taking flats , darks etc .
happy-kat
Posts: 372
Joined: Sun Feb 01, 2015 11:31 am

Re: Strange result in Autodev

Post by happy-kat »

Also autodev can be quite ugly until crop of artifacts etc. has been done
elpajare
Posts: 147
Joined: Tue Jun 12, 2018 6:13 pm

Re: Strange result in Autodev

Post by elpajare »

Those are the paramethers:

Evoguide 50 ED
Coma corrector Starizona EVOFF
Altair 294C ( -10ºC)
Celestron Evolution
Darks+ Flats ( Histog. 50%)
Sharpcap

56x15" stack

No guiding

This is a screeshot of Autodev:
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almcl
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Joined: Wed Jan 21, 2015 7:15 pm
Location: Shropshire. UK

Re: Strange result in Autodev

Post by almcl »

That's a fork mount and not an equatorial, isn't it?

In which case what you are seeing may be walking noise combined with field rotation.

Not sure how to fix that - a wedge, possibly and then guiding. Or it may be that you need to change the way you obtain and stack your darks?
Skywatcher 190MN, ASI 2600 or astro modded Canon 700d, guided by OAG, ASI120, PHD2
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admin
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Re: Strange result in Autodev

Post by admin »

almcl wrote:you are seeing may be walking noise combined with field rotation.
+1

This may be ameliorated (or even completely resolved) by dithering aggressively between frames.
Ivo Jager
StarTools creator and astronomy enthusiast
elpajare
Posts: 147
Joined: Tue Jun 12, 2018 6:13 pm

Re: Strange result in Autodev

Post by elpajare »

Many thanks to all for your advice.

I'll do what you told me
happy-kat
Posts: 372
Joined: Sun Feb 01, 2015 11:31 am

Re: Strange result in Autodev

Post by happy-kat »

elpajare wrote: Evoguide 50 ED
Coma corrector Starizona EVOFF
How are you getting on with the 50ED and that EVOFF?
Is it working well for you or is this your first image with them?
elpajare
Posts: 147
Joined: Tue Jun 12, 2018 6:13 pm

Re: Strange result in Autodev

Post by elpajare »

This equipment belongs to a friend who asked me for advice, it is not the one I use.

He tells me he is happy, but having seen what you say, I have advised him to change it

I use a TSOptics C8 + IMX 294C and these things do not happen to me, my Autodev are clean
happy-kat
Posts: 372
Joined: Sun Feb 01, 2015 11:31 am

Re: Strange result in Autodev

Post by happy-kat »

thank you for replying.
please could you update this thread if your friend fixes the problem and what the fix was?
I have the same telescope and am considering that field flatterer.
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