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Found 12 results

  1. Hi, Has anyone noticed any spherical aberration or off axis aberrations (field curvature, astigmatism & coma) in an achromat in h-alpha? Or a better overall image quality in any way (clarity, resolution, sharpness, contrast, brightness etc) using an APO or ED over an achromat? Thanks
  2. Here's a 10 frame animation. 1 frame per minute. It shows the movement of this large prominence over a very short time frame. A full frame shot to show the relative size of this huge prominence. And another shot with a black dot that shows the relative size of the Earth. Tech Details: Lunt 80mm Ha telescope, ZWO ASI1600mm cooled camera. Processed in AutoStakkert!2 and ImPPG, colorized and layered in PhotoshopCC.
  3. Aenima

    wizardHaOiii

    From the album: CCD venture

    A h-alpha and OIII shot of the Wizard nebula NGC7380. Processed to resemble the hubble palette colour scheme. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  4. The sky was not entirely clear and I hoped for a good seeing with the absence of winds, and in fact in the first half hour watching at the eyepiece was significantly better than the last attempts of this year 2014, but still far from the standard to which I was accustomed a year ago. I then made ​​some capture at lower focal on prominences and main formations and then decided to capture the evolution of the one that seems most interesting, a beautiful tree shape quiescent prominence, it was persistent for several hours, but get involved by a magnetic twister born from the next active region. During the shooting the left side of the prominence was teared off by a magnetic vortex which disturbs the structure turning it around horizontally, while the right side, out of the reach of turbulent magnetic field, it remains inactive and almost untouched. Unfortunately the seeing was quite terrible as soon I started to image but I was interested in the prominence evolution so I continued filming it; even if the details are blured the movements of the plasma is clear and understandable. Images taken with a custom 150 truss refractor using a Daystar h-alpha filter at a focal of 2500mm, the video show 1 hour of real time. Video Waiting for better times I hope you like it, I attach also some shots made ​​in the beginning when the details were at least partially visible.
  5. From the album: CCD venture

    A h-alpha shot of the Wall section of NGC7000 aka north america nebula. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  6. Here is approx. 3.5 Hour of H Alpha data on the Butterfly, IC1318 in Cyngus the Swan. The nebulosity is actual very close to the star Gamma Cygni which can be seen in the top right corner of the frame. There is a lot of nebulosity in this area with the Crescent not very far away and part of the same complex etc... Image capture using the BabyQ and the ST10 Guiding by WO Megzres 72FD and Atik 16IC 20x 600 sec via a Baader 7nm H Alpha filter All processed using PI and Photoshop.
  7. Here is the North American Nebula in H-Alpha. This is only 10x 800sec with the ST10 which is a H-Alpha hoover, it simply suck-up H-Alpha since this is where it is most sensitive, approx. 60%!!! This is also the first image from the BabyQ and it has performed fantastically. I have never seen FWHM values consistently well below 1 before now, not even with the TOA130F. At my location narrow band imaging is a lot better than RGB, I simply get too many issues using broadband filters.... Unfortunately, the good weather has gone to be replaced by the rain! The second image has an additional contrast stretch and sharpening applied in PhotoShop. There is a little too much noise but its due to the fact that my DARKS at taken at -20Deg.C and the camera's thermo-electric cooler was struggling to get below -15 Deg.C due to the hot sticky nights lately.
  8. Aenima

    Bi-colour NGC7000 Wall

    From the album: CCD venture

    A h-alpha and OIII shot of the Wall section of NGC7000 aka north america nebula. Processed to resemble the hubble palette colour scheme. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  9. From the album: CCD venture

    A h-alpha shot of the pelican nebula in Cygnus. 2 x panel mosaic. 10 min subs. 9 x 10m + 9x10m stacks stitched together in ms ICE. ED80 - ATK16HR - Ha clip filter - EQ6 - finderguider 9x50mm PhD2 - photoshop - DSS.
  10. A little bit of a blue sky window this morning around 8am. The Sun was low of course and the sky a bit milky but here is the prom action I witnessed in HA. The clouds soon rolled in from the NW though. 1000 frames, ZWO ASI174MM, AS!2 and Unsharp masking.
  11. So we had some fine weather overhere in The Netherlands during the past 3 weeks, and I took full advantage of the clear nights arounbd the full blood moon (which for me was eclipsed not by the Earth's shadow but by grey clouds as I live in the only part of the country that did not have a clear night during the eclipse) and shot some lovely Ha data of NGC6914 (awaiting processing) and Messier 42 during the second part of the night. The Ha data comprises 7 and half hours of 10 min subs at ISO800 with the Canon 350D/8"Newt, calibrated with darks, flats and bias in DSS and processed in PS CS3. Last weekend, we again had lovely clear nights, and so I shot some RGB data on the Canon 350D/8" Newt combo as well. Also imaged M33 during those nights while waiting for M42 to rise, but again that data still awaits processing. The RGB image consists of 6 hours 25 min of 5 min subs at ISO800, calibrated with darks, flats and bias in DSS and processed by the DSLR-LRGB method in PS CS3. I had wanted to add the Ha data to the RGB image, but for now, it doesnt seem to significantly improve the image, so I just left it out. Hope you enjoy these images, I do, as it was the first time I could image M42 with it not moving through the trees every couple of hours. Great to have my LOMO observatory on my balcony.
  12. Hi all! I am kind of frustrated that I cannot find any source of DSO info that specifies if an object is visible in visible light, or only when putting on certain filters (like H alpha). The other night I took some subs of IC410, but nothing showed up on the stack... Wiki also does not specify in what bands it emits... Is there a site, or other source that specifies this info? For now I only have an un-modded DSLR to shoot subs with, so I need to know if something will show up or not... help!! :-) Gerhard.
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