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Old NGC7000 Mosaic done

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#1 Joe F Gafford

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Posted 21 July 2019 - 05:42 PM

This is an old mosaic of the North America and Pelican nebulae. The red is due to the Lumicon Sky nebular filter in the same train with the Kodak Royal Gold 400-2 film. The same nebular filter did better with the Kodacolor emulsions of the 1980's. One thing, this filter shifted in response over time and this was noted shortly after these exposures were taken by others who published data on the available nebular filters. The newer filters shows less shift over time. 10" F/4.5 Newtonian with an Olympus OM-1 camera. Mosaic of 5 images of 30 minutes each on 9-2-2000. Lumicon Sky filter on the Lumicon field flattener and Easy Guider I still use.

 

NGC7000Ac_Mosaic_medWeb.jpg

 

 The dark sky site at the time. The old Meade mount. This is what I had to deal with. We had a full complement that night, mosquitoes carried some away. 

EGK_06-17-2001001Aa_smWeb.jpg

 

Joe


  • Todd N, aa5te, Alen K and 6 others like this

#2 TxStars

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Posted 21 July 2019 - 11:11 PM

Looks good Joe.

 

Which software did you use to stitch the images together?



#3 Joe F Gafford

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Posted 21 July 2019 - 11:55 PM

The usual Photoshop PS-6 with Pixinsight used to clean up the gradients, not in this case due to the near 100% Ha nebulosity in the image. Negatives and slides scanned in 16 bit tiff with the brightest stars under the maximum value with plenty of pedestal on the minimum density portions. Manually stitched together and matched in brightness and contrast. The auto stitching does not work due to film grain.  

 

Joe



#4 TxStars

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Posted 22 July 2019 - 11:14 PM

Ahh .. That explains it..

I have tried some different software packages and have not found one that could do the stitching for me..



#5 Alen K

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Posted 23 July 2019 - 01:54 PM

Ahh .. That explains it..

I have tried some different software packages and have not found one that could do the stitching for me..

Have you tried Microsoft Image Composite Editor (ICE)? I have been using it for all my mosaics and I find it works well. It has even worked for film images like this one, which was not planned but just stitched from photos I noticed had some overlap. Not as nice as Joe's.

 

 

gallery_96203_4345_122792.jpg

 

Full link with details: https://www.cloudyni...nebula-ic-5070/


Edited by Alen K, 23 July 2019 - 01:57 PM.


#6 TxStars

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Posted 24 July 2019 - 12:19 AM

I will have to give that one a shot and see what I get..  Thanks



#7 pisceskidd

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Posted 26 July 2019 - 01:08 AM

Impressive work though. 




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