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Veil Nebula with Vintage Camera Lens, 



    
        

            FrostByte
Veil Nebula with Vintage Camera Lens
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Veil Nebula with Vintage Camera Lens

Technical card

Imaging telescopes or lenses: Asahi Pentax Super Takumar 135mm f/3.5

Mounts: iOptron SkyGuider Pro

Software: Astro Pixel Processor APP

Filters: Optolong L-eNhance 2" L-eNhance 2"


Dates:Oct. 4, 2019

Frames: 565x120"

Integration: 18.8 hours

Avg. Moon age: 6.22 days

Avg. Moon phase: 37.79%


Astrometry.net job: 3256082

RA center: 20h 49' 56"

DEC center: +30° 27' 10"

Pixel scale: 6.555 arcsec/pixel

Orientation: 58.628 degrees

Field radius: 3.306 degrees


Resolution: 2903x2180

Locations: Home Observatory, Marquette, Michigan, United States

Data source: Backyard

Description

Veil nebula complex through a vintage Super Takumar SMC 135mm f/3.5 lens. This started out as an RGB image, but the chromatic aberration was so bad through this lens that the nebula was hardly visible. Then I added about 11 hours of data through a dual-band filter, but unfortunately this lens was not capable of focusing the OIII and H-a wavelengths simultaneously. I added an additional 2 hours of H-a data before the clouds struck. The combined HOO image looked decent, but the background was very noisy and the stars had a blue cast.

This image is a combination of the RGB background and stars. The stars were removed, and then a stars-only image was generated in GIMP. Then the HOO image was blended with the RGB background without stars with a luminance mask. The stars were blended back in, first with the "erode" filter to eliminate the dimmest stars. Then the full star image was blended back with 10% opacity to minimize the impact of the dim stars, which blended in nicely with the sharp HOO image.

The image is still not so great... but considering where it started... maybe not half bad?

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FrostByte
FrostByte
License: None (All rights reserved)
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Veil Nebula with Vintage Camera Lens, 



    
        

            FrostByte