> BULGARIAN ACADEMY OF SCIENCE ASTRONOMY CALENDAR FOR 2016

  • Posted on: 14 February 2019
  • By: tihomiry

You can find my last DSLR Astrophotography article in Bulgarian at page 76. I am sharing my last findings for this publication, Specially written for the Institute of Astronomy. My research was made during the last year in searching of should I need to upgrade my camera and witch one would be the best for me. After writing the article I do upgrade with Pentax k-5 – the best camera from Pentax. It was a great improvement.
Even the new K-3 has lower http://www.dxomark.com/ score and thus I do not believe that the higher number of Mpix will show much improvement as most of the current lenses are best around 12 Mpix resolution.

Article could be found at: http://nao-rozhen.org/astrocalendar/2016/Astronomical_calendar_2016.pdf

Recently I got one very good lens the Asahi Takumar 135mm 1:2.5. This is fast telephoto lens and from my point of view a good lens should be with aperture from 1:1,2 to 1:2,8.

Moon at 45% illumination and 70x magnification. With aperture of 200mm,14,1 stops dynamic range, color depth of 23.7 bits at this image there are slight color variation on the moon surface that reveals it’s structure.

This is the beginning of my research on how dark the sky could be and what is benefit of a dark sky for astrophotography. I was inspired from those 2 sites. First one presents mathematical model of how dark the sky is.

You can find my last DSLR Astrophotography article in Bulgarian at page 76. I am sharing my last findings for this publication, Specially written for the Institute of Astronomy.

Satellites, cosmic trash or UFOs, the moving spots are everywhere on the sky. Typical satellite behavior is to reflect sun light. It should be yellow or white and could fade and shine due to its rotation.

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