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Big FOV, Big Pixels, and Drizzling

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#1 John Tucker

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Posted 08 December 2019 - 07:43 PM

You guys already knew this, but I got a big kick out of learning about it today. 

 

27 x 120 seconds on the Veil Nebula at F2.8/400mm.  Canon DSLR with 5.7 uM pixels. 

 

Stacked in DSS and minimal processing in Astroart.  On the left standard stacking, on the right drizzled.  Probably some subtle differences in stretching as well, but I tried to minimize these. 

 

drizzle effect.JPG

 

 


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#2 ChrisWhite

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Posted 08 December 2019 - 09:29 PM

Nice john. Drizzling really works wonders with undersampled data!
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#3 ebeygin

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Posted 09 December 2019 - 11:57 AM

Amazing results. I would be interested in seeing the comparison on a part of the Veil itself.



#4 DuncanM

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Posted 09 December 2019 - 02:53 PM

You might also try these AA7 settings in addition to drizzle:

 

Preprocessing ->options->RGB demosaic->colour synthesis algorithm-> 4 gradiants 1x1

 

Preprocessing ->options->RGB demosaic->post processing->reduce colour fringes.

 

I love the incredible speed of AA7 64bit and it makes it really fun to use drizzle.


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#5 sharkmelley

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Posted 09 December 2019 - 03:44 PM

Great result!

 

It's always good to see an occasional reminder of the power of drizzle.

 

Mark


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#6 John Tucker

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Posted 09 December 2019 - 04:00 PM

Amazing results. I would be interested in seeing the comparison on a part of the Veil itself.

OK, I'm not sure these are identically processed, but I tried my best.

 

Capture.JPG



#7 John Tucker

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Posted 09 December 2019 - 04:03 PM

Great result!

 

It's always good to see an occasional reminder of the power of drizzle.

 

Mark

Its the power of asking questions of people who get better results than you in this case. :>).  Nice guy over on the Texas Astronomy Facebook group.  Not sure I have his permission to use his name here.




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