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Image of the day 05/27/2016

    Large Magellanic Cloud, 



    
        

            Wei-Hao Wang
    Powered byPixInsight

    Large Magellanic Cloud

    Image of the day 05/27/2016

      Large Magellanic Cloud, 



    
        

            Wei-Hao Wang
      Powered byPixInsight

      Large Magellanic Cloud

      Equipment

      Imaging Telescopes Or Lenses
      Sigma 180mm/F2.8 APO
      Imaging Cameras
      Nikon D810A
      Mounts
      iOptron CEM60-EC
      Filters
      H alpha
      Software
      PixInsight · RegiStar · Photoshop CC

      Acquisition details

      Dates:
      May 4, 2016
      Frames:
      16x180" (48') ISO800
      H alpha: 12x180" (36') ISO800
      Integration:
      1h 24'
      Avg. Moon age:
      26.84 days
      Avg. Moon phase:
      7.95%
      Bortle Dark-Sky Scale:
      2.00

      RA center: 05h22m39s.1

      DEC center: -68°5805

      Pixel scale: 11.521 arcsec/pixel

      Orientation: 0.713 degrees

      Field radius: 7.045 degrees

      More info:Open 

      Resolution: 2420x3680

      Locations: Coonabarabran, Coonabarabran, Australia

      Data source: Traveller

      Description

      The lens is wide open.

      There are three versions. The original version combines the H-alpha and normal RGB exposures, and gives H-alpha a much higher weight, to mimic my impression of the LMC from the film era. In my memory, color slides can record very vivid red nebulas in the LMC, but today's DSLR photos of the LMC usually have purple or even blue nebulas (probably because of their strong [OIII] emission). I love the red nebulas, so I created a version with red nebulas, using H-alpha to overpower [OIII].

      Ver.B contains very little additional H-alpha, primarily just the normal RGB. This is the modern DSLR view of how the LMC looks like.

      Ver.C, the final version, sits between the above two. It gives the modern look, but still has the H-alpha punch.

      Comments

      Revisions

        Large Magellanic Cloud, 



    
        

            Wei-Hao Wang
        Original
        Large Magellanic Cloud, 



    
        

            Wei-Hao Wang
        B
      • Final
        Large Magellanic Cloud, 



    
        

            Wei-Hao Wang
        C

      Sky plot

      Sky plot

      Histogram

      Large Magellanic Cloud, 



    
        

            Wei-Hao Wang