Just getting started with narrowband imaging. I am really liking this image scale for the 135mm f2 lens. This was taken wide open at f2.0.
127x60s - 5nm Ha
51x240s - 3nm Oiii
21x120s - 3nm Oiii
Both channels were processed using the following workflow:
* Dynamic Background Extraction
* 45 rounds of wavelet regularized deconvolution using a Dynamic PSF made from the best 50-60 stars in the middle of the frame, and replaced stars using a starnet made starmask.
* Small Scale TGV noise reduction using a low-contrast mask
* Masked Stretched with a preview-aggregated background reference
* Histogram Stretch to taste
The Bi-Color combination was performed with starnet starless versions using the following expressions:
iif(HaStarless > .15, HaStarless, (HaStarless*.8)+(OiiiStarless*.2))
iif(HaStarless > 0.5, 1-(1-OiiiStarless)*(1-(HaStarless-0.5)), OiiiStarless *(HaStarless+0.5))
iif(OiiiStarless > .1, OiiiStarless, (HaStarless*.3)+(OiiiStarless*.2))
A star mask was created using the Starnet data to make a StarsOnly image, and PixelMath was used to bring in the RGB star color that was taken from my 071mc data that was processed and posted here:
https://www.astrobin.com/413476/?nc=user
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