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North American Nebula and Dust Lane

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#1 Jim Thommes

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Posted 18 September 2021 - 10:01 PM

This image is a first for me - it's the first time I have connected a dedicated astro camera and FW to a DSLR lens (Sigma 150 APO). The short backfocus of the ASI294 camera allows the FW connection in the optics train and still achieve the lens flange backfocus requirement. The result is a 7.37 degree FOV (in the major axis).

 

The target is the North American Nebula region (NGC 7000, LBN 373, Sh2-117). In this field are multiple LBN and LDN cataloged items Only selected LBN's are annotated because there are so many. The field also includes the Pelican Nebula (IC 5070, LBN 350), IC 5068 (LBN 328), and the Gulf of Mexico Nebula (LDN 935) The major dust lane that runs approximately vertically through the field consists of LDN 914, 935, 936, 940 941, 945, 950).

 

There are a few other interesting objects: Dark nebulae Barn 349 and 352, Open Clusters Berkeley 54 and NGC 6997, Planetary Nebula NGC 7027 (PK84-3.1) Deneb peeks in from the right side of the image. Although the image scale doesn't do justice to the open clusters and planetary nebula. 

 

Image and details can be accessed at the link below (or by clicking on the North American Nebula thumbnail below). The annotated image  has a link below but it can also be accessed from the main image webpage as well. The full FOV image can be accessed from the image webpage and has an image scale of 7.0 arcsec/pixel.

 

 

NGC7000_Sigma150_PI1_AF1_small.jpg

North American Nebula Region

 

 

Annotated Image:
North American Nebula Region Annotated

 

Scope: Sigma150 APO lens at f/4.5
Camera: ASI294MM (Baader Ha, RGB, ZWO OIII filters)
Location: DAA Observatory, Shelter Valley, CA


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#2 Mert

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Posted 19 September 2021 - 03:59 AM

That's wonderful Jim, the enormous field of view puts this in another perspective.
Great colors!

#3 Jim Thommes

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Posted 19 September 2021 - 06:21 PM

That's wonderful Jim, the enormous field of view puts this in another perspective.
Great colors!

Thanks Mert.

 

I still need to work  a little on camera tilt and I'm not quite sure if this lens is up to expectations on optics. Not sure how much time I want to spend on this image train. I like the idea of a big field like this and I could still double the image scale by going to 1x1 bin with the ASI294. The question is whether or not I can make the optics good enough for the increased image scale.



#4 elmiko

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Posted 20 September 2021 - 12:51 AM

Beautiful image Jim! Colors are spectacular!



#5 pixlimit

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Posted 20 September 2021 - 02:14 AM

Excellent image Jim, looks great!



#6 Jim Thommes

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Posted 20 September 2021 - 07:25 PM

Mike, Peter,

Thanks for the comments!


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