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About keesscherer

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  • Interests
    Widefield astrophotography (QHY16200/Canon EOS 6Dmodded/Canon 700Da Cooled+24MM-F1.4 EL-200MM-F2.8 EL)
    Esprit 100 f 5.6 Triplet/ Esprit 80 f5.0. 10 Micron GM2000 HPS/ AZ EQ5-GT/ Scopedome 2M
  • Location
    Portugal, near Tomar
  1. I don't have any RGB from the QHY16200 yet, but i have some RGB taken with my Canon 6Da (50x240 sec iso1600 with the same Esprit 100 f5.5 telescope). So i played a bit with this set. Star colour is not great but i don't want to increase saturation beyond this. Used a luminance mask for saturation and CIElab colourspace combination.
  2. After i returned a new Skywatcher Esprit 80 because of strange diffraction patterns around bright stars i got a different looking new Esprit 80 back. See the attached 2 images, the "old" one has the usual looking logo in red and the "new" one has a logo with green striping above and below the "Esprit 80ED" text/ Another difference is the colour of the ring on the back of the dew shield. The serial number for the "old" one starts with 1509 and for the "new" one with 1606. Does anybody here know about this design change? I also included images taken with the "old" Esprit 80 showing 10 second exposures of Sirius. Left: with full 80 mm opening. Right: with a 70mm aperture mask.
  3. This is one of the first images made (20170430) with my new QHY16200 CCD camera. I used a Hutech IDAS LP2 filter for this luminance image, 29x600 seconds binned 11 @ -20C. The data was calibrated with the beta version of Astro Pixel Processor (APP) using darks and flats. The QHY16200 was attached to the Esprit 100 on the GM2000 HPS mount. All images unguided.
  4. Single frame with foreground (as is, i did not change the composition or used masking) Scorpio Milky way region. Canon EOS 5Dmk2 and 24 mm at F5.6. Exposure 60 seconds at ISO3200. Processed in Pixinsight (contrast stretch and gradient removal). The light area is light pollution from Tomar, a nearby city. Image date: May 17 2015
  5. Imaged from Portugal (where i live) on May 24, 2015 with Skywatcher 100 ED Esprit Super APO triplet and Full spectrum Canon EOS 6D. I used 47x120sec ISO1600 lightframes and 20 darkframes. About star reduction processing techniques, i like the way these images look without star reduction. And i am not supposed to use a full spectrum camera on a refractor telescope, but i like the result. I also try to avoid noise redution where possible (so this image was processed without it). Stacked with Deep Sky Stacker and processed in Pixinsight 1.8.
  6. Good result ! But why did you use 15x300sec are you planning to take more subs?
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