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Showing results for tags 'tadpoles'.
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Hello fellow gazers... I started shooting this one back on Feb 20, when i grabbed 11 x 1200s of Ha subs. 4 of the 11 were not of great quality, due to some light intermittent clouds, but i included them anyway in the stack (such is the trust i place in APP's 'Quality' algorithm). Then on March 3 i finally got another clear night, so while i waited for the sports facilities floodlights to switch off, i grabbed a short set of 20 x 90s RGB subs (just the D5300 with no filter) so i could use them for RGB stars. Then afterwards managed to grab 12 x 1200s of OIII subs. It's been a busy month (house move coming up) so i've only just got around to looking at it now. Processing this one has been a challenge. I wanted to push it hard, to show up some of the nebulosity that sits between the two nebulae, which meant the sky background became an utter pain to deal with. It was noisier than i would like, and still is, hence the need to use more noise reduction than i would normally. Having the stars in a separate layer is great, makes processing so much simpler. It has also improved my workflow i think, as i now tend to end up with an image that has 3 layers, Luminance, Colour, and Stars, rather than a single layer (which i sometimes would, due to laziness!). So now it's easier to go back and fix something later if i decide i don't like it. Full details: 11 x 1200s Ha (2" Baader mounted) 12 x 1200s OIII (2" Baader mounted) 20 x 90s RGB (for stars only) Nikon D5300 (modded) SW 80ED w FF/FR HEQ5-Pro Captured with SGP, pre-processed in APP, post-processed in PS. Ha assigned to Red, OIII to Blue, and Green was synthesized using one of Noel Carboni's actions in PS. I probably spent a good 10 hrs processing this one. Mostly due to trying to create a starless Ha image that was as clean as possible (which was a major PITA i must say!). Also, while the OIII signal was stronger than i was expecting for the tadpole nebula, it was unbelievably weak in the Flaming Star nebula. All i could get, after extreme stretching, was a small blob around the central section, so i gave up on the idea of using Annie's 'Hubble Palette Creation' Action and just went with a Bi-Colour approach. I might try the Hubble Palette just on the tadpoles at a later date, it should take to it much better. This one felt like a struggle, so i'd be grateful for any C&C, no matter how harsh. I think i have a tendency to go 'too far' in my processing, and i might well have done so here. Let me know what you think! Cheers!
IC 410 – The Tadpoles IC 410 (‘The Tadpoles’) is a fascinating region of nebulosity in the Constellation of Auriga. This dusty star-forming region is part of a larger area of nebulosity that also contains IC405 (’The Flaming Star Nebula’) located around 13000 light years away. The gorgeous shapes within the nebula are sculpted from immense stellar winds from radiation developed by the large, hot young stars in the embedded open star cluster, NGC 1893. The two immense, dense structures radiating away from the centre of the nebula give it its common name ‘The Tadpoles’. These are the remnants of vast pillars of dust and gas left over from the formation of the star cluster itself. My main imaging focus recently has been to capture Ha data for B33 (‘The Horsehead Nebula’) but this object only rises above my local horizon after 22.00 so to fill the time while I wait for the Horse to arrive, I decided to capture IC 410 but the clear nights have – of course – coincided with the presence of the Moon ......... thank goodness for 3nm filters! I added my most recent data to that captured in October, 2017 to complete this phase of the image. Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filter: Astrodon 3nm Ha Subframes: 22 x 1800 sec Ha Integration: 11 hours Control: CCD Commander Capture: MaxIM DL Calibration and Stacking: PixInsight Post-Processing: PhotoShop PS3 The Tadpoles
I have finally managed to collect sufficient OIII data to produce my bi-colour version of 'The Tadpoles', a nebulous region in Auriga. This has not been an easy task as the skies have been most unhelpful and it has taken several nights for each channel often gaining less than 5 subframes at a time! The majority of the Ha was captured under moonlit conditions where the very narrow bandwidth came in very useful. I still have work to do on the stars but will wait now until I have some SII data to complete an HST palette version. Image Stats Mount: Mesu 200 Telescope: Sky-Watcher Esprit 150 Flattener: Sky-Watcher Esprit specific Camera: QSI 683 WSG-8 Filters: Astrodon 3nm Ha and 3nm OIII Subframes: 22 x 1800 sec Ha, 25 x 1800 sec OIII Integration: 23.5 hours Control: CCD Commander Capture: MaxIM DL Calibration and Stacking: PixInsight Post-Processing: PhotoShop PS3 The Tadpoles
This is only my second image with the new camera, so please be forgiving! Atik460EX on HEQ5. 19x 600 secs Ha mapped to Red. 19x 600 secs OIII mapped to G and B. Processed in DSS and Photoshop. I suspect i may have overprocessed - I am super keen to learn a number of techniques and perhaps used too many!
I think I'm done with the Hydrogen layer for these nebulae. I started 3 weeks ago a 4 panel mosaic with the 130PDS. I shot around 2h on each panel in 180s subs at 300 gain. And recently I thought to lower the noise in the darker areas and I shot another 7h with the Canon 300 F4 L and I combined the dark areas. I see now that I should have taken more frames with the scope as the quality of the image taken through the lens is way lower. Anyway, I still combined them a bit. The plan is to add LRGB too in the future and perhaps some O3 as well. Full resolution 16 bit .png here: https://drive.google.com/open?id=0ByhJ_xuQxcnjNjdyMUpqSkJFYUU And, in order: the image taken with the lens, the one with the scope and the blend. Thoughts are welcomed. Clear skies, Alex