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The fault in my stars

Started by JohnH, Feb 14, 2022, 11:47:39

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JohnH

Quote from: Roberto on Mar 22, 2022, 12:20:34
John

That is much better!  Your image still shows tilt which I am sure can be corrected.  If you are user of NINA, there's a new plugin that helps assess tilt and backfocus errors for imagers.  It is called Hocus Focus.  I very much recommend testing it out.  ASTAP also has a tilt analysis routine.   There's a (very long) thread on CloudyNights about both:  https://www.cloudynights.com/topic/809050-tilt-discussion-astap/page-19#entry11789196

Roberto

Thanks Roberto,

That is a loooooonnnnngggg thread!! I have used ASTAP and it suggests that my tilt is now 8%. Perfection is to be desired but I do not know if I will really be able to improve.

I do not use (or know anything about) NINA or Hocus Focus but I will look them up.

I have been trying to fix backfocus, it seems a dark art.

I hope to get some RGB data for Cederblad 214 tonight with the same telescope collimation. I will then have another tinker and see if I can improve anything.

Regards,

John
Sir Isaac Newton should have said, "If I have seen further than others it is by inventing my own telescope".

The Thing

Hi John,

Good  luck. I'm also embarking on the NINA/Hocus Focus (plug-in) trek as I have similar problems with one corner being shown to be way out by ASTAP. I use NINA all the time but not this plug-in, the latest version of which looks very comprehensive for image train problem analysis.

Duncan
We're all guinea pigs in the laboratory of life. Better a fluffy guinea pig than a lab rat!
¯\_(ツ)_/¯ (Gallic shrug :))

JohnH

Quote from: The Thing on Mar 24, 2022, 12:00:35
Hi John,

Good  luck. I'm also embarking on the NINA/Hocus Focus (plug-in) trek as I have similar problems with one corner being shown to be way out by ASTAP. I use NINA all the time but not this plug-in, the latest version of which looks very comprehensive for image train problem analysis.

Duncan

Hi Duncan,

From what I see this is not for me as it seems to be ASCOM based. I am Mac which does not run ASCOM, the equivalent is INDIGO which does not offer these functions.

I wasted Tuesday's imaging (not sure what I did but my Flats all have a mysterious ring which is not visible on the raw lights.

I might be able to have another go tonight and see what results.

Regards,

John
Sir Isaac Newton should have said, "If I have seen further than others it is by inventing my own telescope".

The Thing

If its a ring like a doughnut over the whole image thats another problem I'm trying to get a handle on. Apparently it may be caused by the flats light source colour being different to the subs causing a different Newtons ring pattern on each so the flat doesn't correct it out. Apparently.
We're all guinea pigs in the laboratory of life. Better a fluffy guinea pig than a lab rat!
¯\_(ツ)_/¯ (Gallic shrug :))

Mac

QuoteI am Mac
Thats normally my line.

Can you not run a virtual PC with USB Access?
You might need usb to serial cables

The cpu usage when running the ascomm software on a true PC is negligible, a virtual PC on a mac would run any ascomm software with out any speed issues.

Worth a try.

The real Mac.  :cheesy:
Never, ever, argue with an idiot. They'll drag you down to their level and beat you with experience.
If you argue with an idiot, there are two idiots.

JohnH

Quote from: Mac on Mar 25, 2022, 11:43:10
QuoteI am Mac
Thats normally my line.

Can you not run a virtual PC with USB Access?
You might need usb to serial cables

The cpu usage when running the ascomm software on a true PC is negligible, a virtual PC on a mac would run any ascomm software with out any speed issues.

Worth a try.

The real Mac.  :cheesy:

I can try (I do have emulator software), but Windows and Ascom are an undiscovered continent for me.

Regards,

John
Sir Isaac Newton should have said, "If I have seen further than others it is by inventing my own telescope".

The Thing


FYI YouTube video taking you through Hocus Focus in NINA.

Quote from: The Thing on Mar 24, 2022, 12:00:35
Hi John,

Good  luck. I'm also embarking on the NINA/Hocus Focus (plug-in) trek as I have similar problems with one corner being shown to be way out by ASTAP. I use NINA all the time but not this plug-in, the latest version of which looks very comprehensive for image train problem analysis.

Duncan
We're all guinea pigs in the laboratory of life. Better a fluffy guinea pig than a lab rat!
¯\_(ツ)_/¯ (Gallic shrug :))