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Found 6 results

  1. Hi all, This one is a composite from two of my telescopes : TS APO with reducer = FL 550mm F5.1 iso 800 : 13x20 min Ha + 6x20 min OIII TS Imaging Star 71 = FL 350mm F5 iso 200 : 82x3 min RGB (only Hutech IDAS LPS-D1 used) I am new to NB processing, so I followed this tutorial but also improvised some. Weather did not permit more OIII data, so I squeezed as much as I could out of it. To start with, I only used the green channel from those subs because that channel had the strongest signal. Filters are Astronomik 2" 12nm. Today I would have used iso 200 even for the NB pics, not 800, since I just learned that 200 is the optimal setting for my (dual) Nikon D7000´s. The small APO was attached to the HEQ5 Pro CW bar so imaging was done with both scopes simultaneously. 3 minutes exposures is max for the secondary camera due to some remaining flex in that part of the rig which I have not (yet) managed to cancel out. Stars removed with Straton, then the Ha/OIII image and the wide field RGB image were aligned with Registar and blended together in PS. All C&C is most welcome. CS Ragnar
  2. Hey guys I shot my 1st full Bi-Colour NB image back in October/November of 2017. It was the Elephant Trunk Nebula, and at the time i remember having a hard time processing it to my own satisfaction. Fast-forward 5 months and, well the weather is bloomin awful, lol, and the nights are now short, so i thought i would re-visit this in the hope i could do better now that i have a bit more PP experience under the belt. The main differences this time (apart from rotating the image to frame it differently) are, RGB combination was done in APP rather than PS. The OIII signal was also given an x2 multiplier to help boost it (this meant i didn't have to give it a big manual stretch in PS). No HLVG has been done at all this time, as i now prefer to leave the Green in, as i think it adds more depth to an image, as long as it's not excessive. This has made a big difference i feel, as from memory i think i really went to town on removing the Green in the original version, and subsequently everything came out brown as a result. I also went with a smaller stretch overall compared to last time, although i did up the Vibrance quite a bit in the new version (i couldn't help myself). Overall though, compared to the original the new version has had a LOT less processing done to it. Whether that shows (or even helps) i'm not completely sure. Still not 100% sure it's the best version of itself it can be, but overall i am much happier with the result. I actually didn't do any sharpening at all in this one, so i could possibly do something there. C&C most welcome please. Have i gone overboard on anything? I had a hard time getting the overall brightness to a level i was happy with. When i thought i had it right, i looked at it the next day at work and on my phone and it looked way too dark, so i ended up cranking it up several notches as a result. 7 x 600s and 14 x 900s of Ha 17 x 900s of OIII (just shy of 9 hrs in total). 50 Bias and 30 Flats Combined as SHO. The SII was synthesized from a blend of 30% Ha and 70% OIII. Taken with the usual gear: Nikon D5300a and SW 80ED scope on a HEQ5 Pro mount. Captured with SGPro, pre-processed with APP and post-processed with PS. Here's a link to the original thread: And the latest version:
  3. Like most fortunate enough to be able to image through the clear nights of the past week I captured some of the best data of my time in this hobby. I focussed on IC 1396 and the Elephant Trunk nebula imaging it in both narrow band and LRGB I posted my first effort on this object after an hour of data in each channel of Ha, Oiii and Sii. This final process contains 2 hours in each channel / bias-flat-darks / processed in PixInsight with no tools used except HistogramTransformation, CurvesTransformation and SCNR...no noise reduction. I'm going to process a bi-colour example then move on to the data I captured on the Wizard Nebula :-) These are very low resolution screenshots - full resolution can be seen on my website. David
  4. Recently I decided to open up my wallet widely and go Narrowband... And before my set up comes, I decided to check how to process NB images. Plus, The last half a year was mostly cloudy so I started playing around with Hubble TelescopeRaw Images If someone will decide to kill some cloudy evenings in the same manner, Hubble Telescope raw images are freely available on Hubble Legacy Archive https://hla.stsci.edu And please also share your results on this forum. My first pancake below - "Pilar of Creation" (part of it) combined in Pixinsight. (M16-P1 - [Used Images: hst_10393_13_acs_wfc_f658n_sci & f502n_sci]) P.S. Raw Hubble Images are sooooo ugly... I was very, VERY pessimistic about my experiment initially
  5. Hi SGL members! As I'm moving to 2" filters I wish to sell my 1.25" mounted filter setup. This setup consist of a kit of Baader LRGB as seen here for example: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p563_Baader-LRGB-CCD-Filtersatz-1-25----Interferenzfilter---4-Filter.html @268 Euros plus the piece de resistance, the Astrodon 3nm ones; Ha, SII, OIII. New they are 608 Euros a pop.... Example: https://www.teleskop-express.de/shop/product_info.php/info/p5153_Astrodon-1-25--Narrowband-Filter-H-Alpha-3nm-mounted.html I will part with the LRGB set for £150 and the Astrodons for £450 each of £1200 for the lot of three. That is effectively most of the haggling done already. These filters rendered me six AAPODs in one year alone, and that was with mediocre OTAs and substandard processing skills... I can accept PayPal, UK or French, UK or European Bank transfer, I can ship from the UK or France, no problem as I tend to go back and fourth. Let's say £7.50 per filter shipping cost for insurance purposes. They will also be available for pickup in London shortly. The filters have never been cleaned or wiped. They have lived in Atik Filter wheels as long as I had them. Below: LRGB set to the left, Astrodons to the right. /Jesper PS There might be an ATIK EFW2 up for grabs too once these are gone ;-)
  6. Hi guys I've been staring at these for long enough now that i'm effectively going blind to them, so i think it's time to post them and see what you guys think as well. It's late, so i'll keep this brief! 10 x 1200s Ha (2" Baader) 9 x 1200s OIII (2" Baader) So not much exposure at all really, but it's all i'm going to get for a while. The Ha was shot low on the horizon, and with a big bright moon up, but at least i managed to get the OIII the following night (mostly) before the moon made it's re-appearance. The usual Bias, Flats, and aggressive dithering. Stacked in APP, and processed in PS. For the Bi-Colour version i used one of Carboni's actions to synthesize the green channel (with Ha in Red and OIII in Blue). For the SHO version, i used 80% of Ha and 20% of OIII to synthesize an SII, then used tonemapping to bring out the colours. Normally i prefer the hubble palette, but i'm not sure about this one. I think i prefer the Bi-Colour one. Dunno. Let's see what i think in the morning! C&C welcome, and thanks for looking :-)
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