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This has been a bit of a project. Last year I worked out that my 200mm Canon F2.8 lens and ASI1600 would frame the whole of the Veil complex quite nicely. I captured Ha and OIII data for the east and west nebulae with a Tak FSQ 106 and added this into the widefield image. Although the Tak data had to be shrunk down it did add a bit of extra resolution where it was needed.
The difficulty for me has been the processing. I have found it really difficult to tease out the faint wisps of detail and have tried the usual routines of micro contrast adjustments using curves along with Scott Rosen's Screen blend/mask inversion method but the results weren't great owing to the close proximity of faint and bright nebulosity. I'd heard about the PI process tool for removing stars, Starnet, so loaded this and had a rare foray into PI. This proved very helpful. It was a luminence created from Ha and OIII using the 200mm lens with the Tak data mixed in. Then the starless layer was added in PS with the screen blend mode at 50% opacity. The nebulosity detail was so well preserved I didn't need a mask. After blending I reduced the stars a bit more using the starless layer again and darken as the blend at 50%. I should really unleash some of the stars to add a bit of "punch" but I've wrestled with this data enough for now! I plan to use it further as I look deeper into the Gorgon that is PixInsight!
Telescope: Tak 106 for E and W veils. Canon 200mmL lens
Camera: ZWO ASI 1600 pro mono cmos, Gain 150, offset 50
Filters: Baader 7nm OIII and Ha
E+W Veil 10x30 mins each channel for each nebula. Whole complex 50x5mins for each channel
Captured with SGP, calibrated, aligned and combined with PI, processed mainly with PS but PI for Starnet. Ha mapped to red and OIII to both blue and green
Finally managed to observe the Veil nebula on last Saturday!
I remember spending too many hours searching for it during my observations.
The milky way band in the morning came up really nice ,almost a continuous band from scorpious to Cassiopeia (managed to see that too!).
Thinking about giving veil a last try, we pointed our skywatcher 8 inch dobsonian scope with 32mm plossl eyepiece and lumicon UHC filter and BAM! It was right there, bright enough to show it for first timers too! Looked like an arc or smoke chain coming out of matchstick.
All The reports say that Veil nebula is an easy object, but I have had hard time seeing it all this time, while easily observing Flame nebula and Horsehead nebula through smaller telescopes.
Maybe it's the real dark skies...or just some plain luck!
Eastern Veil - first light with my new (second-hand) QHY8L - and my first ever colour image.
Taken on 21 Sep, 2017 @ 23:15 ~ 24:00 QHY8L camera @ -5 C Quattro 8" with CC Avalon M-Uno mount 10 x 5 minutes, guided & dithered (with PHD2 / Nebulosity) FLATS, BIAS, Bad pixel map, de-Bayer, and a bit of stretching and saturation (also in Nebulosity.) It's somewhat cropped since the CC spacing was a bit wrong.
As I'm on holiday with relatively dark skies, I've attempted an O3 / Ha bi-colour image of the veil complex, it'll be apparent from the quality that I'm a beginner, especially at post processing. It was done with a mirrorless cam (Fuji X-T1), so needed exposures of 6mins which the star adventurer (or my polar alignment) wasn't really up for, so had to discard a lot of subs, even the ones used show some trailing (8x6mins O3 and 7x6mins Ha, no calibration). Lens was a Canon 200mm F2.8 at F3.4
Used AA6 to stack and do minimal processing, but really don't quite know what I'm doing, still need to watch some of the tutorials. So, just stacked the O3 and Ha frames separately as colour images and then added 0.7xHa to the O3 image.
I had fun doing it and probably will try again with my HEQ5 mount back home.
Any suggestions welcome, I guess these might be along the lines of don't do narrowband with a colour cam and learn to post-process properly .
We have been battling a bit over that last few nights trying to gather data on a detail of the Eastern Veil nebula - a section known as the Bat. This is 20 minute Ha and OIII subs - 5 hours of Ha and 3 hours 40 mins of OIII. Esprit 120; QSI 690; Mesu 200 - Astrodon 3nm filters.
All comments gratefully received.