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M42 in HaSIIOII using ZWO 36mm NB filters - ASI1600MM-C

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#1 cfosterstars

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Posted 27 December 2017 - 10:37 AM

This image is part of a mosaic I am building of M42. I have all the Ha data, but still need the OIII and SII for the 2nd an 3rd panels. This is M42 - Great Orion Nebula in LHaSIIOIII. It is really my first serious image processing attempt with all PixInsight. I will be posting my work flow later but here it is:

 

OTA: Orion EON 115mm APO with WO Flattener IV - 1.19 microns/pixel - 680mm FL
Mount: Orion HDX-110 EQ-G with ASI190MM-mini and ORION 70mm Guide scope with PHD2

ASI1600MM-C/EFW with 16mm ZWO 7nm Ha, OIII, SII filters
T= -15C, Gain 200, Offset 40, USB 60

 

Ha: 30 X 10s, 30 X 180s
OIII: 30 X 10s, 30 X 180s
SII: 30 X 10s, 30 X 180s
40 flats, 40 dark flats, 60 darks

 

Exposures for each filter were calibrated, registered, and stacked with PixInsight. I combined the 10s and 180s exposure with HDR composite. I used a super Luminance with the combined data from all three filters but still need more time to process. However, for this image, I was able to process out the remaining edge artifacts from the filters for the first time. The full NB data does not do the star color well, but the resolution looks good to me. The ZWO filters show a lot of star halos, but I am OK with that. I have been looking at a lot of published images for major observatories and even the Hubble and they show halos around bright stars as often as not. 

 

I did just receive my set of Astrodon 36mm filters and will likely repeat the data to see how the ADs perform compared to the ZWO filters.

 

M42 2LHaSIIOIII LRGB
 
 
Comment and improvements are sincerely welcome.
 
thanks,
 
chris

 



#2 AlbertoP

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Posted 27 December 2017 - 11:47 AM

It is always good to start with Pixinsight, and that better object that M42 to start, HDRMultiscaleTransform personally I think it is essential to save the area of the trapeze, I want to see the end result of the image.

 

I encourage learning.

 

Best regards.

 

Alberto.



#3 1onica

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Posted 26 December 2018 - 02:36 PM

Incredible work Chris, 

 

What are you using for capturing the mosaic? and how many panels does it have? 1x3?

 

Looking forward seeing the final result



#4 cfosterstars

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Posted 26 December 2018 - 09:11 PM

Incredible work Chris, 

 

What are you using for capturing the mosaic? and how many panels does it have? 1x3?

 

Looking forward seeing the final result

1onica,

 

This image was from last year with my original ZWO filters. I have since have many upgrades. I also ran out of time last year to it finish this project. I therefore started over from scratch. I am about 30% through a two panel mosaic with much better technique, hardware and processing skill than last year. I have the Ha data for the two panels compete and more filters on the M42 panel. It looks far better. Each panel will be about 30 hours of integration. I need about 12 hours more for the first panel. I was going to just do LHaRGB, but since the full moon hit in the middle and I had nothing better to do, I collected OIII and SII data. So the full project will have seven filters. I was not planning on a third panel. 

 

I also want to finish this project since I have a new feathertouch focuser and William Optic Flattener 8 coming in January and that will be another big upgrade in the hardware but I cant do that until I finish this mosaic and a M33 project I am also working on. 

 

As Jon Rista always says, the best noise reduction is more exposure.



#5 cfosterstars

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Posted 27 December 2018 - 01:43 PM

This was the Ha mosaic from the previous run. I found that I did actually create this much of the project.

 

M42 Mosaic In Ha



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