This image was processed using the same narrowband data as the SHO palette version but RGB data came from a different acquisition with FLI ML16200 camera collected on 8/9-10/2020.
Total acquisition time is again roughly 29 hours.
My goal with this image was to showcase the fine detail in the core of Sh2-132 and emphasize the structural differences in the Ha and SII data. I chose to follow a color combination scheme for narrowband imaging via color modifiers presented recently by
@Adam Block on The Astroimaging Channel and on his website:
https://www.youtube.com/watch?v=vRfeUWfrsKcThe technique is similar to the popular dynamic SHO combination approach but differs in a key way. Dynamic SHO combination is usually performed in the non-linear state, while Adam's combination with color modifiers is performed in the linear state, after star removal. This has the important advantage that the shackles of having to balance weights so everything adds up to one are removed and one is free to change relative contributions of different channels at will. The otherclever insight in Adam's technique is that every step of the way, one can balance the various channels by applying a DBE process to neutralize the background. Again the result is maximum freedom to differentiate contributions to the color signal from each narrowband channel.
SII and Ha signals are differentiated in shades of red-yellow, with SII falling in the deep red and Ha more towards orange.
Processing was carried out primarily in Pixinsight and final adjustments in Adobe Photoshop.
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