First stacked image...
 
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MAY 4 2026: APP 2.0.0-beta44 has been released !

New improved internal memory controls should now work on all computers

May 1 2026: APP 2.0.0-beta43 has been released !

Improved internal memory controls (much more stable and faster on big datasets), fixed CPU image viewer, fixed Narrowband extraction demosaic algortihms.

Apr 29 2026 APP 2.0.0-beta42 has been released !

New improved Normalization engine, Fixed random crashes in integration, fixed RGB Combine & Calibrate Star Colors, fixed Narrowband extraction algorithms, new development platform with performance gains, bug fixes in the tools, etc...

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Update on the 2.0.0 release & the full manual

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First stacked image, need help please

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(@monsonmjmgmail-com)
Main Sequence Star
Joined: 3 years ago
Posts: 14
Topic starter  

Hello. I finally got a stacked image from APP! But, I don't understand how to polish it. The attached image is IC1805, 20 300sec exp at 0 gain with an ASI2600MC via an 80ED. Specifically, the star calibration didn't help my stars colors (maybe it doesn't do that?) and the overall red-hue is more than the nebulosity. Any tips? Thank you for your time.

IC 1805 80ED lpc cbg St 1

 



   
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(@xyfus)
Red Giant
Joined: 5 years ago
Posts: 38
 

@monsonmjmgmail-com 

The "overall red hue" seems fine to me - this region is actually all over with faint ha emissions...

Your stars are that bloated because they seem to be saturated (they ar full white in the middle and have big halos), dont know your camera setting - but i got a imx571 osc too and 300s does saturate bright stars even in low gain mode.

your blue channel seems to bloat more, this can be your scope optics or (is your camera with uv/ir filter?) you could use a tigher uv/ir cut filter. Maybe you had some misty air this can bloat to.

Could be many more reasons, first i simply would use some shorter exposure time, thats the main issue...


This post was modified 1 year ago 2 times by Sebastian Richter

   
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(@monsonmjmgmail-com)
Main Sequence Star
Joined: 3 years ago
Posts: 14
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Thank you



   
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(@mabula-admin)
Universe Admin
Joined: 9 years ago
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Posted by: @monsonmjmgmail-com

Hello. I finally got a stacked image from APP! But, I don't understand how to polish it. The attached image is IC1805, 20 300sec exp at 0 gain with an ASI2600MC via an 80ED. Specifically, the star calibration didn't help my stars colors (maybe it doesn't do that?) and the overall red-hue is more than the nebulosity. Any tips? Thank you for your time.

IC 1805 80ED lpc cbg St 1

 

Hi Tyler,

I agree with Sebastian, the region is actually full with H-alpha signal, so it is actually good that it is revealed by your data.

Did you expose 300seconds without any filter? Or did you use a light pollution filter perhaps?

The Star Color Calibration tool should actually give you accurate star colors. Maybe Sebastian has a good point, the stars might be too saturated. Solution can be to expose shorter for your next object, or when you use the Star Color Calibration tool, try to select areas with a star population that is not clearly affected by the H-alpha nebulosity and that contains no or little bright and saturated stars. Then the result should be good.

Let me know if this helps.

Mabula

 

 



   
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(@artem)
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Joined: 8 years ago
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@monsonmjmgmail-com, nice result, with your first stacked image, good luck and CS



   
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