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Found 7 results

  1. After two years of trying and failing, I finally got a reasonable shot of M101. It took two hours and 48 minutes of exposure, taken over a couple of nights, and it still could have used more. From a dark sky site it would have been easier but from light-polluted London it was particularly tricky to image and I was beginning to think it wasn't possible with my setup. It's a bit rough and the colours are not quite right but I'm pleased to have got this much of it. 21 x 8 minute exposures at 400 ISO 11 x dark frames 20 x flat frames 21 x bias/offset frames (subtracted from flat frames only) Guided with PHD Captured with APT and processed in Nebulosity and Photoshop Equipment: Celestron NexStar 127 SLT GoTo AltAz mount with homemade wedge Orion 50mm Mini Guide Scope ZWO ASI120 MC imaging and guiding camera Canon 700D DSLR
  2. First serrious aquisition with new Ultimate 600D from JTW Astronomy. Date: 14-15.may.2013 Location: Valea Izvorului, Mehedinţi, România Object: M101 - Messier 101 - Pinwheel Galaxy Mount: Celestron CGEM Optic system: William Optics Megrez 90mm APO dublet, f/6.2, 558mm WO P-FLAT4 reducer at 430mm and field corrector Photo system: Ultimate 600D Guiding: TS 50mm finder with barlow andQHY5 mono CCD Acquisitions: 12x10' , ISO 800 Processing: PixInsight and PS6
  3. Beautiful clear night in Denmark on Sunday night, so got out there in the cold for a few hours: (Skywatcher 200p, EQ5 goto mount unguided, Canon 450D, [42 x 120s subs @ iso 800, 16 x darks, 16 x flats, 16 x flat darks], DeepSkyStacker + Gimp for levels adjustment) Polar alignment was a bit off, so some trailing. But I feel it's much better than my first attempt below (didn't do flats, so horrible vignetting, and focus was off, though alignment was better):
  4. One of the big challenge when doing astrophotography from a light pullet area is taking LRGB photos, but after many hours of work I’m very happy with the outcome. The Pinwheel Galaxy M101 I photo during the last 2 weeks. It’s a beautiful galaxy in Ursa Major…right next to the handle. The galaxy is about 21 light years away and it is 170,000 in diameter. It estimate with 1 Trillion stars (Wikipedia).Here are some photo details:Luminance – 60x 10Min = 10 HoursRed – 30 x 3Min = 1.5 HGreen – 30 x 3Min = 1.5 HBlue – 30 x 3Min = 1.5 HTotal Exposure: 14.5 HoursTelescope: Skywatcher P250 F4.8Camera: QSI586 MonoMount: ASA DDM60Filters: Astrodon Gen2 LRGBSoftware: MaximDL, Photoshop CS6.https://www.flickr.com/photos/101543943@N04/27660824561/in/dateposted/ I realy liked the details I got in the center so I added a crop versionhttps://www.flickr.com/photos/101543943@N04/27735508475/in/dateposted/ Hope you like it. Haim
  5. From the album: Deep Sky Objects

    M101 - Pinwheel Galaxy OK Sorry to post the same image twice but this just demonstrates the power of better data processing tools. I came across a piece of software called Astra Image Plus (http://www.astraimage.com/) which lets me adjust things with a bit more control and pull out more detail, so I have re-processed . If you want more details the astrobin link is: http://www.astrobin.com/251187/
  6. Toxophilus

    M101

    From the album: Deep Sky Objects

    M101 - Pinwheel Galaxy Taken over 2 nights to trial a new guide camera (QHY5L-II mono). The guiding was much better than with my old camera. However I'm still experiencing camera timeouts. I think I have resolved this by running the camera on a dedicated USB cable rather than through a hub, but time will tell. I'm fairly pleased with the result given the ligher skies that we have at this time of year with it never really getting truly dark. If you want more details the astrobin link is: http://www.astrobin.com/251187/
  7. After a couple of days of clear nights and the forecast looking good for another it seemed like a good idea to go to a place with darker skies than London and try a more challenging target. Alas, the run of good weather came to an end and upon arrival at Kelvedon Common in Essex the sky was murky with only Ursa Major bright and easily visible...so revisiting M101 made sense. The poor conditions meant that even with 6 minute exposures the galaxy was only just visible on the subs so I was pleasantly surprised at how the resulting image came out. 004 x 180 second exposures at Unity Gain (139) cooled to -20°C 014 x 360 second exposures at Unity Gain (139) cooled to -20°C 074 x dark frames 030 x flat frames 100 x bias/offset frames Total integration time = 1 hour and 36 minutes Captured with APT Guided with PHD2 Processed in Nebulosity, Fitsworks, and Photoshop Equipment Telescope: Sky-Watcher Explorer-150PDS Mount: Skywatcher EQ5 Guide Scope: Orion 50mm Mini Guiding Camera: ZWO ASI120MC Imaging Camera: ZWO ASI1600MC Pro Baader Mark-III MPCC Coma Corrector Light pollution filter
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