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Found 12 results

  1. Hey guys So with no new data at hand (or on the horizon it would seem) i decided to go back and re-process my short stack of M81 & M82, being the glutton for punishment that i am! The last time i re-processed this was about a year ago, so i was curious to see if i could get any more out of it. It's hideously low on data (nothing new there!), this is just 9 x 600s of colour (with an IDAS-D1) together with 7 x 1200s of Ha (which i only used to Lighten the Reds in the Ha jets of M82 and the small spiral regions of M81). AstroPixelProcessor used for stacking and gradient reduction, and PS for everything else. I mistakenly shot the colour at ISO 800, instead of the usual 200 i always use. A mistake i imagine every DSLR user has made before! And i have to say i really noticed it during processing. There was noticeably less colour in the stars. That being said, i was still able to bring out more colour in the core of M81 this time. And i think M82 looks a bit better as well, it was definitely over-sharpened before. I really love these targets, but they just make me wish i had more reach! CS! Here is the original thread: And here's the new one, including a cropped version:
  2. From the album: DSO, Nebula, Galaxies, Comets etc

    M81 Bode's Galaxy in the constellation of Ursa Major imaged 09.02.2018 William Optics FLT-110 and Atik 314L monochrome CCD A total of 135 x 60 second exposures stacked in Deep Sky Stacker and processed in Photoshop CS2

    © vicky050373

  3. From the album: SW 150PDS - DSLR 600D / Atik Titan/Atik 314L1+/Atik Infinity

    Taken with Atik Infinity Camera 30 mins duration, preprocessed in AstroArt and Star Tools, processed in Photoshop.

    © B G Wadham

  4. A new camera, means a lot of testing and seizing every possible clear night at your disposal. I used the first nights with my "ZWO ASI183MM-Pro" shooting hydrogen alpha, but now I wanted to test it on a broadband target. And what better test-subject than good old Bode's Galaxy/Nebula, for this image size! Upon processing the 3,6 hours worth of luminance data, I then realized that I missed the color in the image. So I went digging for the last images I shot of M81, which was with a Nikon D5200 sometime last year. I aligned the images and set the old image to color, and got this as my final result. I must say though, that I've probably gone through 20 different renditions of this one, as I kept trying to improve it, and finding a new favorite image But here is the last one I came up with, together with the separate luminance data and the 2017 M81 image Upon further investigation, I've noticed some dust-motes that has snuck into the image... Guess I need to figure out how to do flats.. They were never really necessary when shooting with the DSLR as noise would be too high anyway if you stretched it this much. Shot with: ???? Skywatcher 150PDS ZWO ASI 183MM-Pro (Nikon D5200) Celestron Advanced VX Mount Explore Scientific Coma Corrector Baader Neodymium Filter 213 Minutes Luminance (4 Minute + 8 Minute Subs) 136 Minutes of Color DSLR (2 Minute Subs) Combined Image (5.816 hour data) Luminance Data (3.6 hour data - ZWO ASI 183MM-Pro) DSLR Image (2.26 hour data - Nikon D5200) Any advice or thought are accepted with open arms! One thing I know myself, is that I need to improve my mounts PEC data-set, to improve my guiding. It worked very well when I first did it, but that is like 1,5 years ago now.
  5. M81 and M82 are two targets I love coming back to every year as each attempt yields more detail. This time, using the f/5 150mm Newtonian with its shorter focal length, the galaxies came out better than ever. It was a lovely clear night for imaging with good seeing and low humidity so a perfect time to see what this scope can really do. 77 x 75 second exposures at 400 ISO (1 hour and 36 minutes total integration time) 29 x dark frames 79 x flat frames 21 x bias/offset frames (subtracted from flat frames only) Captured with APT Guided with PHD2 Processed in Nebulosity, Maxim DL, and Photoshop Equipment: Sky-Watcher Explorer-150PDS Skywatcher EQ5 Mount Orion 50mm Mini Guide Scope ZWO ASI120 MC imaging and guiding camera Canon 700D DSLR
  6. Hey guys We had a couple of clear night over the weekend (finally!) so i decided to put the man-flu to one side and get back to imaging. I mostly went for the Rosette Nebula (still a WIP for now) but once it passed behind the neighbour's house i was starved of any other Ha targets. The big, bright moon was well up at this stage, but the skies were crystal clear so it seemed like such a waste not to use them. So, i decided to go for M81 & M82, seeing as they were well positioned, and just hoped that shooting galaxies under a bright moon wouldn't be anywhere near as bad as shooting nebulae in RGB under the same conditions. Due to the lateness of the night, and my own health limitations, all i could manage was 140 mins of Ha on the 1st night, and 90 mins of RGB on the 2nd night. I made a boo-boo on night 2, and captured at ISO 800 instead of 200, which resulted in most of the stars being blown-out (i really, really hate how SGP is obsessed with ISO 800. why won't it let me set a default?!). The Ha data wasn't really of much use if i'm being honest. The OSC data picked up the Ha portions of M81 just fine, so it was just the jets in M82 where it only really added something, although i do think it was worth it in the end. Here's the capture details: 9x 600s RGB (2" IDAS-D1) 7 x 1200s Ha (2" 7nm Baader) 30 Flats, 50 Bias, dithered aggressively every frame Stacked in APP, Processed in PS (i used the Ha data for the Red channel in the RGB image). SW80ED, HEQ5-Pro. It's obviously light on exposure, i would ideally have liked at least 3 hrs of RGB, but beggars can't be choosers i suppose, so i'm calling this one done and moving on I haven't done much RGB or galaxy imaging, so C&C welcome as always guys.
  7. Just a quick report on tonight's observation . Got an AZ GOTO mount on Monday and have the 130p mounted on it ... to be honest , I was worried about getting it set up right , but after a look around SGL found the information on coordinates that were needed and it works 100% . 3 new Messier and NGC targets were found tonight , well , 4 if you add NGC7000 , but it was too faint to count as a catch - it looked like a very faint cluster . The big catches tonight were in the Ursa Major region : Bode's Galaxy M81 and the Cigar Galaxy M82 . Both were well defined and bright , even in the 5 inch reflector and I was very happy to see them for the first time . Up to now M57 was my favourite DSO , now it's joint favourite with Bode's Galaxy . NGC7635 Bubble Nebula was also a first and added to the list tonight . Several other targets , e.g. Pinwheel Galaxy , in Ursa Major region were attempted tonight but with no luck - maybe darker Winter skies will give better results with these .
  8. I like returning to these targets regularly because on every attempt I manage to bring out a little more of M81 (which is absolutely vast and should fill nearly a quarter of the frame). I guess the trick is to keep adding more data. This image comprises of data from February 18th and March 25th 2015. 28 x 30 Second exposures at 3200 ISO plus 43 x 30 second exposures at 6400 ISO with 19 dark frames and 16 flat frames.
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