I had a few minutes before my wife and kids returned this evening and I decided to redo edit of my data from last year instead of starting on new data. 

Just amazing what a year in this hobby can change.  Image B and C , are versions of  my image from last year. The mouse over provides a stark demonstration of how the processing and stars have changed in the two images. I have also included several comparison zoomed in images.  With 2022 on the left and 2021 on the right. Still some noise that I left to avoid making it too fake looking to my taste. Also, there are some artifacts from Starnet original the were left from my base edit that Starnet2 has done much better with on other images. 

In general over the last year, I have had much better luck bring out dark nebula while decreasing the noise with helpful advice over the past 9 month. In addition, the biggest change for me lately has been the introduction of the GHS stretch. While I have had verifying luck with it. I have been doing this for most of my images lately with good results compared to star deemphasis and star reduction methods. 

Initially, I STF  stretch the  linear data. Then I remove the stars and complete sharpening, saturation, curves, etc. Then I go back to my linear image image and stretch it with GHS at 1.5-2.5 stretch factor and around 9-10 local stretch intensity. I mark an area near the nebulosity and set this as the SP point.  I then take starnett2 and remove the limited stretched stars and add them to my edited starless image. The results have definitely been a step up for me in my option. 

The Dark Shark is located in the Constellation of Cephus approximately 650 light years from earth. Dark Nebula are thick clouds of gas that absorb the wavelengths of visible light that obstruct our view of the more distant stars. Also in the shark are located 2 fascinating reflection nebula on the head (VdB 150) and under portion of the thorax (VdB149. However, my favorite is the beautiful spiral galaxy that can easily be made out behind the dorsal fin PGC 67671. Further research on the simbad database shows this galaxy is about 57 million light years distance  from earth. 

Definitely check out the full image. I drizzled the image which definitely help with start size and shape with my under sampled set up.