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I managed to catch a bit over an hour of RGB with the ASI071 (on Esprit 150 and Mesu200) last night before the clouds rolled in, so I could add it to my Ha data prebviously posted. Most of the RGB is 5 min exposures but I also added some 60s and 10s exposures to save Sadr - the very bright star in the centre of Cygnus and to the left in this image - it was completely blown out in the 5 min exosures. I added Ha to the red channel and I used something like a tone mapping approach (blurring out the stars of the RGB data) since the RGB stars were big, then I used Ha again as lum and I subsequently added the stars separately by selecting them in the Ha image and use the selection to cut them out of the RGB image. Sounds a bit complicated and it was. In that way I preserved the sharpness of the Ha data and kept the stars small. All done in PS of course except initial stacking and calibrating in PI. Now totally 8.8 hours.
Any comments much appreciated - I have the feeling the image could be improved but not sure how.
I grabbed 3h40m of the Sadr region stretching from the crescent up to NGC6914 (not visible as it's a reflection neb!), in HA light - may add to this in HA, but also would be nice to bring LRGB into it at a later date.
QHY163M, Canon 200mm 2.8L II (working at f3.85), Losmandy GM8 - taken 17th Sept 2018, West Oxfordshire. All in 5min subs, guided with a ASI120MM on a 50mm guider. Baader 7nm filter. Processed in PI.
Thanks for looking.
(ergh - jpg compression artifacts aren't great in this
Captured a little over an hour of data on this nice nebula. So far I've only been able to capture a bit of Ha, but I'm hoping to add OIII later.
As i only have Ha data for now, i thought I could have some fun with coloring. Not quite sure if i like it or hate it, but it's a first attempt anyway...
35x 120sec exposures with the QHY5L-II-M and a 135mm F/3.5 lens.
3 sets of rain showers today after last nights thunderstorm has cleaned the skies, very high transparency.
First off I'll list the prize tonight, B352 and B353 near the NAN and seen with no filter- what a stark, black contrast those two "thumbprints" are!!
I'm going to list some nebula that typically need filters but under good skies portions of them can be seen:
NAN- Gulf section easy, with the rest a bit fainter, Pelican a faint glow
Crescent neb- this is surprising really, a sharp, short streak can be seen near the "triangle" locator stars
Veil neb- easy, both sections and even patches of the Wisp and the "claw" of the eastern Veil showed nicely
OIII filter observing produced fine views tonight, IC 1318 was nicely contrasted and all those nebs listed above were amazing! The whole NGC 7000 area has nebulosity in it, it just never seems to end. After using images for maps- I have many- I now am confident that the neb on the "other" side of the Gulf is Sh2-119 and while faint is actually easy to see. I like warming up before getting serious to obs so after a good round on the Big Veil I went back over to the "little Veil" Sh2-91, now this is a good test of conditions and dark adaptation. The 10" dob pulled it in though for success on this very tough object system- I obs the portion labeled 01 on the map tonight. After obs this faint object my eyes were ready to go back to the bright NAN....
The scope set up used was the VX10 f4.8/Lumicon OIII/21mm,17mmEthos and the SQM-L gave up 21.8 under high transparency skies.
Another late night with true darkness happening about 11:30pm and the Milky Way shone brightly. The view of "our" object can be simply amazing and I saw a new projection (to me) or "arm" up into Cepheus just before the Cygnus rift- Cepheus in this area was strewn with stars and "nebulosity" naked eye. Opposite the Cepheus arm there was another shorter projection of the Milky Way and they both were very sharply defined.
The Milky Way being so bright might explain something that I see and puzzles me... I see an underlying "texture" to the sky in most places and in particular right in the MW- I'm leading into how the objects listed looked tonight to put things in context. The wide field of the SW120ED/42mm LVW only enhances this phenomena and also allows me to see...
Scarp15, who also has an interest in neb hunting asked about a few nebs he is seeking, so first off I wanted to try IC 5068 near the Pelican in the NGC7000 area. I have studied this area quite a bit and have seen IC 5068 before, but the thing is that the whole area is surrounded with that underlying "texture" blending into more visible nebula- and lots of them, IC 5068 being one. The SW120ED gave a fantastic view of the Pelican, showing its head and a few detached nebs around it, the NAN was "bright", surrounded in places by dark strips of sky.
So, once that extra wide view panned the NAN, a dark lane on the back of the neb was noticed- opposite side of the Gulf and Pelican and just past this a huge liquid shadow came into view...I followed it up down and sideways, at first I thought it is an extension of the NAN but I don't think so. I'm trying to find this oblongish patch on the maps and in images- so far only the rift really shows. However the nebula is distinct and separate from NGC7000, this was my prize of the evening!
I had seen hints of it in the dobs but the FOV was too small.
Another favorite and a goto object of mine. It showed well in the frac, both with the UHC and the Hb with a totally different perspective than in the dobs, the VX10 shows this one best perhaps but that wide FOV is riveting. In dark skies this object is not hard, harder than the NAN though.
My suggestions to anyone who wants to maximize their views of IC 5068 and area would be: use a low exit pupil 5mm-6mm+, make sure your FOV is big enough-2" widefields shine for a lot of this stuff and finally- try the "big 3" filters (UHC,Hb,OIII), it's amazing the different presentations they offer in this area- and what pops into view with each one.
Actually this is what I do and use on most nebula and this enables even modest aperture scopes like the SW120ED to give some fantastic views, from dark skies.