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Proof of concept mosaic 19th April - It can be done some day

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#1 Arctic eye

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Posted 20 April 2021 - 11:20 AM

19th April I had a good seeing and I managed to pull out a kind of "proof of concept" mosaic. There was a small cloud in the sky and of course it plunged in front of the moon and stayed there for a while, making one part of the material soft. But I proofed myself that I'm on track. Hope you enjoy it. I especially like how the Janssen crater worked out.

 

So here is a 75% version of the mosaic, it is quite decent to watch: https://astrokuvat.k...75.jpg?img=full

 

Here is a bit brighter version of the same: https://astrokuvat.k...ht.jpg?img=full

 

And here is a full 100% version, hopefully you can open it: https://astrokuvat.k...00.jpg?img=full

 

And a bit brighter version of the 100% mosaic too: https://astrokuvat.k...ht.jpg?img=full

 

 

I used ICE to align the panels (except 1 that rejected every time) and then did the adjustments and blending and adding the last panel in photoshop.


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#2 MisterDan

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Posted 20 April 2021 - 12:16 PM

Astonishing and mesmerizing.

Thank you for sharing your images, Ari.

 

Cheers and best wishes.

Dan



#3 Sky King

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Posted 20 April 2021 - 12:59 PM

Sweet! Great magnification!  What did you image this with? Thanks for sharing! 



#4 SkyHunter1

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Posted 20 April 2021 - 01:41 PM

Wow! Amazing shot, but the detail when you magnify it is incredible...

 

Great Work!

 

Regards,

Skyhunter1



#5 Tom Glenn

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Posted 20 April 2021 - 04:06 PM

Ari, this is a really spectacular image that one could spend a lot of time inspecting.  Excellent work.  



#6 Arctic eye

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Posted 21 April 2021 - 09:52 AM

Thank you all, glad you liked it!

 

Sweet! Great magnification!  What did you image this with? Thanks for sharing! 

I used SW16” goto dob, powermate 2x + paracorr2, Baader 685nm ir pass and ASI183mm camera.

 

This was my proof of concept that I can reach same detail level with this wide field imaging train, including coma corrector, that I have been able to reach with my other imaging trains in narrow field detail imaging. In good seeing I can reach this certain level that seems to be my scopes absolut limit. I suspect it is a combination of diffraction limit in infrared and the optical quality of the scope.


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#7 John_Moore

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Posted 21 April 2021 - 11:08 AM

Incredible shot, Ari -- that's the best view of the Ina structure (an IMP Irregular Mare Patch) I've seen for a long time through an earth-based telescope.

 

John



#8 Arctic eye

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Posted 22 April 2021 - 04:40 PM

Thank you, John!

 

Now, as a bonus before we lay this thread into rest, something from the 2018 that I promise also to try again as an ultimate goal in this "proof of consept" resolution level. Might proof to be impossible though wacko.png

So back at 2018 there was several consequent clear evenings with fairly good seeing and I managed to get a series of moderate level mosaics and built an animation out of them. So maybe some day a series of mosaics from 3 day old to full moon in full quality...

 

Link to spring 2018 mosaic animation, open and click for full resolution: https://astrokuvat.k...2d.gif?img=full


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#9 Claude Navarro

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Posted 23 April 2021 - 08:02 AM

Excellent, really ! Could you tell us how many images were necessary for this mosaïc ?

Claude N.



#10 shortonjr

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Posted 24 April 2021 - 10:41 PM

Thank you all, glad you liked it!

 

I used SW16” goto dob, powermate 2x + paracorr2, Baader 685nm ir pass and ASI183mm camera.

 

This was my proof of concept that I can reach same detail level with this wide field imaging train, including coma corrector, that I have been able to reach with my other imaging trains in narrow field detail imaging. In good seeing I can reach this certain level that seems to be my scopes absolute limit. I suspect it is a combination of diffraction limit in infrared and the optical quality of the scope.

Thank you for sharing your work! Your pics are astonishing! And to see you used a dob to capture the moon in a mosaic makes me want to do the same. Can you post a pic of your imaging train used in this capture? I can see the other items listed but which coma corrector are you using?  Thanks.



#11 Borodog

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Posted 24 April 2021 - 10:42 PM

I think the paracorr is the coma corrector.



#12 shortonjr

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Posted 25 April 2021 - 12:03 AM

I think the paracorr is the coma corrector.

Yes, you are correct. I guess it's time for me to get one!



#13 Arctic eye

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Posted 25 April 2021 - 12:47 PM

Yes, Paracorr2. Coma corrector is between Powermate and camera. This gives 2,3x total.

 

IMG_0722.JPG?img=smaller

 

 

I have been using also APM comacorrecting Barlow, which gives 1,5x...1,6x

 

IMG_0723.JPG?img=smaller

 

Excellent, really ! Could you tell us how many images were necessary for this mosaïc ?

Claude N.

I used 10 videos, 2400...2500 frames each, 10-20% stacked. And for the animation 7 such mosaics. AS is quite genious, because it uses different subset for each AP, not rejecting the whole frame.So no need to increase frame count when increasing coverage. Good and bad seeing is in smaller patches, one corner of large frame is good and one corner is bad, and the next second they are the opposite. This helps a lot and was a pleasant surprise when going into high resolution sensors. 


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