Taking advantage of a long spell of clear nights in October I managed to put together around 50 hours of data, which cleaned out of high clouds, ended up in a total of 48 hours integrated. My personal record! A side-benefit of setting up in the backyard, although the sky, as being out of the city is not good, but narrowbanding plays its magic. 

I captured it with the equipment indicated in the data along with the 135mm/asi183mm in a dual set-up, so along with this version it does come another wide-field version, where the "Lion" is a bit clearer and many other objects are visible, and for those of you, as I myself, which lack good pareidolia capabilities, I produced a "cave man" version of the "Lion". So, as you can see, a trilogy hopefully worthy of this wonderful object. 


So, what about the object?....Sharpless 2-132 is a very faint emission type nebula in the Perseus arm catalogued by Stewart Sharpless. The estimated size is about 250 light years, quite a walk!. So what is causing this volume of 250 ly to emit (at least) in the visible spectrum? Two Wolf-Rayet stars (check version M), WR 153ab and WR 152. Along with these two super generators of stelllar winds loaded with stellar mass from these two dying stars (but not that old, as they have short lifetime) (More on them here), in addition they are helped with several small open clusters of young stars. 

As a result, a wonderful combination of Hydrogen and Oxygen emitting in an interesting shape and with lots of features. UNavoidable is the distinctive blue band running the centre of the image, the gas-dust structure near this band, and the wide loop towards the top of the image. Although I have been searching for information about these features I have not found much besides the information provided by @Kevin Morefield  with his wonderful rendering of this  object. (So if you know further info explaining these features please let me know!)

The total processing time is per channel:

Ha = 88 x 600s
Oiii = 107 x 600s
Sii= 94 x 600s

In relation to the processing, quite normal workflow. Two remarkable aspects : 1) very little noise reduction as the resulting integration images were nice 2) use of StarXterminator which I think produces better / easier results than Starnet.

The process has been:
1) cropping and DBE. Deconvolution on Ha. Very soft Multiscale linear transform for noise reduction
2) two "lanes" of stretching:
2.a) Stars lane
2.a.1) combine with pixelmath : R=0.8*S+0.2*H G=0.9*H+0.1*O B=0.9*O+0.1*H. SCNR of green cast.
2.a.2) stretching = arcsinhstretch comparing results with soft masked stretched ==> end up choosing MaskStretched
2.a.3) application of StarXterminator to extract nicely tight and color stars. Produce also a mask out of them.
2.b) backgound lane
2.b.1) Histogram Transformation (until the curve cuts the second vertical line, about 25%)) of each channel
2.b.2) application of StarXterminator. Use the more bloated stars as an inveser mask to fill with little noise (uniform) the "holes" left by the starxterminator on some stars, in order to make all background homogeneous.
2.b.3) combine the backgorund channels with pixelmath : R=0.8*S+0.2*H G=0.9*H+0.1*O B=0.9*O+0.1*H. SCNR of green cast.
2.b.4) application of noise reduction and high pass on some dust clouds3) application of stars to the background using the star masks as a filter (application with pixel math) ($T (masked)+ stars)
4) stars color and bright adjustments
5) final levels in lightroom and some cosmetic touches.


Wow, quite a long post, extra karma to you to reach this point :-)  Thank you and hope you like it!.