31.7./1.8.2012 – testing my new catadioptric teleobjective with the Moon

Date: 31.7./1.8.2012
Time: 01:10-02:30
Observing site: Kuru, Ylöjärvi, Finland
Instrument: L102/1000mm (4” Refractor), camera: Canon EOS 1100D, lenses: Canon EF-S 18-55mm IS, Samyang 800 mm catadioptric-teleobjective,

NELM: 3,06
SQM: 17,36
Darkness of the background sky: 5
Seeing: 3
Transparency: 2
Weather: Mostly clear sky, light wind, +10 °C

Objects observed: T Cas (visual), Moon (photography)

During this session, Moon was shining at low altitude in the southern sky, and it partly was causing the lightness of the sky. The sky is still light because of summer here in the high latitudes.

During the early night I was photographing the Moon with my Canon EOS 1100D -camera for testing my new Samyang 8mm catadioptric teleobjective. For comparison, I also photographed the Moon through my L102/1000mm refractor. For more in-depth post about this, look here.

I also did one variable star observation, this time I observed star T Cas. I didn’t see any noctilucent clouds, but I won’t do a negative observation either because of the rather poor conditions.

Variable star observations:

Date Time Star Mag. Comp.
31.7./1.8.2012 01.35 T Cas 8.4 8.4/8.8

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