Nebulae in Cygnus

The Cygnus constellation is full of various hydrogen nebulae, but they are very faint in visible wavelengths, so it's very difficult to see them with your eyes in a telescope. However, when you use a modified camera, which lets the infrared wavelengths go through, and you take a long exposure, the complicated nebulae will appear.

 

One of the brightest nebulae in Cygnus (which is even visible in big telescopes) is called the Crescent Nebula and lies roughly in the center of my image. In the upper right corner, there you can also see Tulipan nebula (or Sh2-101), which is fainter than Crescent and lies at a distance of 6000 light years, which is about 1300 ly further than Crescent. Another interesting region lies in the bottom left corner. It's a Sadr region, which is named after a Sadr star, which is the brightest star in the picture and lies 1800 light years from Earth.

 

This image was taken on the 7th of July with my modified camera Canon EOS 1300D and CLS filter, which lets only H-alpha and OIII parts of the spectrum pass through and that's why, it can capture such beautiful details in the nebulae. The result amazed me. It is created only from 3 hours of data, which isn't pretty much for this region. Truly happy with this progress and looking forward to the next tries.

 

Canon EOS 1300D (modified), SVBony CLS filter

Sigma 135mm f/2.8

iOptron SkyGuider Pro

 

EXIF: 120x90sec (3 hours in total), ISO 3200, f/5.6

Darks, flats, dark flats, biases

 

Processed in DSS, Siril, StarNet++, and Photoshop

07/07/2023, Mašov, Czech Republic (Bortle 5)

Done