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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Mars - 2.9.2020 at 02.08 Hyvinkää Observation number 93366

Visibility III / V

Timo Inkinen, Ursa (Etelä-Suomi)

A month from my previous Mars image and very much this has grown in size. So I took a picture of Mars with a TMB 152/1200 lens tube and a 2.5x PowerMate extension + my ASI 183MM Pro camera on the morning of September 1, 2020. That introduced a 3000mm focal length, but paid no special attention to Mars imaging technology. I told this to the forum in more detail and from there I also copied the second observation visual observation report here:

“I also looked at Mars visually with the TS 102 / F11 ED tube and it’s just a good game to withstand magnifications! I used the same 2.5x PowerMate extension with the Pentax SW 7.5mm eyepiece, which comes with a 374x magnification and a 0.27mm output pupil in the 102 / 1122mm tube. One cannot really demand more of a 4 "ED lens tube when even at that magnification the image had only a slight onset of chromatic aberration at the top of the planet. From time to time I saw about the same amount of detail as in the attached image, but with a much lower contrast (i.e., that dark area flashed randomly and the pole cap could be fetched by searching). "

Additional information
  • Observation target
    • Mars
    • Keskitaso
  • Seeing
    • Good
Technical information

Uses 3000mm effective focal length, 1832x1836 video, 16ms shutter speed, 160bps taken from 16bit SER video out of 4002. ASI 183MM Pro camera with gain 111 + Astrodon luminance filter happened to be in front of it.

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