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Veil Nebula Bi-Color Using 105mm Nikkor AI-S Lens and ASI178MM Camera

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#1 james7ca

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Posted 27 September 2018 - 01:18 AM

The Veil Nebula taken with a 105mm focal length Nikkor AI-S lens at approximately f/4 (using step-down/up rings, limiting aperture 26 to 30mm step-up ring) and a ZWO ASI178MM-Cool camera all carried unguided on an A-P Mach1GTO mount. Four hours and twenty-four minutes (88 x 3m) for both H-alpha (red) and OIII (blue) combined to produce a bi-color image with a mix of both Ha and OIII for the green channel.

 

Image processing in PixInsight and Photoshop CC2017.

 

Shown here reduced (1600 x 1064 pixels) and compressed to meet the CN posting guidelines.

 

If I get a chance I want to go back and capture this with a 200mm lens and the ASI183MM camera which should give me about the same field of view but at a higher resolution (and with about 20 mega pixels, rather than the 6 mega pixels that I captured with the ASI178 camera).

Attached Thumbnails

  • Veil Nebula with 105mm Nikkor and ASI178MM (Small).jpg

Edited by james7ca, 27 September 2018 - 06:10 AM.

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#2 Makelo215

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Posted 27 September 2018 - 01:38 AM

Looks great!



#3 james7ca

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Posted 27 September 2018 - 08:45 PM

Makelo215, thanks for the notice.

I think this is a pretty good example of what can be done with a small and cheap camera lens and a high resolution camera like the IMX178 or IMX183.


Edited by james7ca, 27 September 2018 - 09:05 PM.


#4 Greatdanes

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Posted 28 September 2018 - 09:56 PM

Very nice image!



#5 james7ca

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Posted 29 September 2018 - 08:28 AM

Greatdanes, thanks.



#6 szg

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Posted 17 October 2018 - 01:07 PM

I feel disco!



#7 fetoma

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Posted 17 October 2018 - 01:33 PM

James, great image. What size filters did you use?



#8 james7ca

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Posted 17 October 2018 - 07:37 PM

szg and fetoma, thanks for the notice.

 

I used mounted 1.25" filters held in a filter drawer that sits between the lens and the camera. Below is an image of a similar setup (using a different camera). Also, here is a thread on this topic (mounting filters behind the lens):

 

  https://www.cloudyni...r/#entry8422614

Attached Thumbnails

  • Filter Drawer on Nikkonr 105mm Lens.jpg

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