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I thought i'd revisit this one, as i was never truly sure abut the processing originally.
So with this one, i sought to improve the stars (they're a big improvement) but also bring out more of the dark nebulosity. Did i go too far though?! Looking at it again today i think i may have. 🤔
Ha: 7 x 480s, 6 x 1200, 13 x 1200 (a little over 7 Hrs)
OIII: 9 x 1200s (3 Hrs)
RGB (with IDAS-D1 filter): 20 x 60s
The usual Flats & Bias, stacked in APP and processed in PS.
Gear used: Nikon D5300 (modded); SW 80ED (522mm FL); HEQ5-Pro; SGPro and PHD2.
The original version can be seen on the Astrobin link.
C&C welcome and clear skies folks!
ps - At the moment this is still at 100%, but i'll probably end up down-sampling it to about 50%. I don't think it can hold up to 100% tbh.
Edit - Here's the new, now much more toned-down, version. It's a clear improvement, so i'll have to keep reminding myself not to try and go for big & bright, when subdued nearly always ends up looking better!
Original, nasty over-bright version:
This has been on my hard drive for some months, so nice to have finally got round to processing it! Shot over several nights in January in my back garden.
NGC 281, also known casually as the Pacman Nebula, is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. It lies about 9,500 light years from us and is 48 light years across.
As the final version, I've gone for a crop, which I think holds up well, though I'll include the wider fov version in the next post.
I used a more natural colour blend for this image:
R = 76%*Ha + 24%*SII
G = 100%*OIII
B = 85%*OIII + 15%*Ha
For some reason, I was not expecting much from this image, but the result looks like it will be one of my favourites...the narrowband data was really good!
Captured using APT, stacked using APP and processed in Pixinsight.
5.4 hours integration time.
Link to full details and higher res version.
Thanks for looking!
Hello Astro Peeps, I hope everyone is all good! Isn't there some amazing images on this site and others. Amateur imaging has never been so good!
I myself have finally managed to get some data for an image, of which I am very happy. It has been so hot here it has been impossible to get any good data. One day a couple of months ago, I hung the thermometer from the grape vine under the back verandah and it was 47.5°C. Sounds far fetched, although true. I live in Adelaide, South Australia and we are 11km from the CBD and usually 1.5 degrees hotter than there!
Anyway, I thought I'd try my hand at a Ha, OIII bi-colour image while waiting for my SII data to come in. There seems to be a halo issue with some of the filters for which I will need to do further testing so I apologise for their distracting nature. Details are with the image but basically 3hrsx15min subs for each channel.
You can scroll to the bottom to choose another size or auto to fit your screen.
Happy photon collecting! ?
Details for those that cannot see them.
Telescope: William Optics FLT132
Guide Scope: QHY OAG
Camera: QHY9 Mono @ -20c
Filter Wheel: QHY 7 position Ultra Slim
Filters: Baader 36mm unmounted L R G B HA OIII SII
Guide Camera: QHY5L-II
Mount Control: EQASCOM
Focusing: SharpSky Pro and Sequence Generator Pro 3 (automated)
Bahtinov Mask: No (initial focus)
Capture Software: Sequence Generator Pro 3
Guiding Software: PHD2
Calibration and Stacking Software: PixInsight
Processing Software: PixInsight
Number and Type of Data Frames: L= X min, R= x min, G= x min, B= x min
Ha= 12x15min, SII= x , OIII= 12x15min.
Total Image Time: 6 hrs
Location: Lockleys Observatory B, Tanunda, Sth Australia
Light Box by Exfso
Back in early Feb I tried imaging Markarian's Chain, but after 2 subs I encountered guiding issues (a first for me) so had to give up.
So just for kicks and giggles, I decided to process them! ?
So this is 2 x 10mins. With the D5300, 80ED and HEQ5-Pro. 'Stacked' (if it's even right to use that term!) in APP, and processed in PS. Then reduced to 75% for posting.
Why oh why oh why..... I honestly don't even know myself ?
I'm breaking the cardinal rule here of posting late at night, right after finishing PP, so let's see what sense the dawn brings! ?
I shot this in the early hrs of 29th of March. There was no moon present (i think!) and conditions were pretty good, AFAIK.
This is 28 x 360s, so about 2.75 hrs in total. Taken as usual with the D5300, IDAS-D1, and SW 80ED.
APP used for stacking and gradient reduction, everything else done in PS.
Would have liked twice, or 3 times, the data, but it's just not happening, so i've just decided to process what i've got.
Thanks for looking, and all CC welcome as always ?