Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  IC 1318  ·  IC 4996  ·  M 29  ·  NGC 6888  ·  NGC 6910  ·  NGC 6913  ·  The star 34Cyg  ·  The star 40Cyg  ·  The star Sadr (γCyg)  ·  gamma Cyg nebula
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Samyang 135mm Test Image 2: Narrowband, Alex Roberts
Samyang 135mm Test Image 2: Narrowband
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Samyang 135mm Test Image 2: Narrowband

Getting plate-solving status, please wait...
Samyang 135mm Test Image 2: Narrowband, Alex Roberts
Samyang 135mm Test Image 2: Narrowband
Powered byPixInsight

Samyang 135mm Test Image 2: Narrowband

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Description

Another test of the Samyang 135mm, this time connected to my QHY 183M. A Baader 1.25" 7nm Ha filter was threaded into the 10mm spacer ring between the camera and lens.

I continue to be impressed with the optical quality of this lens. There is very little coma, even when shooting at f 2.8.

If you are interested in how to connect a Pentax K-mount lens to a CMOS astro camera, you can see more information here: https://www.astrobin.com/1fsj7w/

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Samyang 135mm Test Image 2: Narrowband, Alex Roberts