Open Cluster NGC1981

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<Image : Open Cluster NGC1981>
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<<Photography Data>>
Date: December 11th, 2001.
Location: Uchihara, Ibaraki, Japan.
Vixen R200SS 200mm Newtonian (f800mm F4.0)
(with coma corrector lens for R200SS)
Vixen GP·D equatorial mount
guided with D80mm f560mm refractor
 using high sensitivity video camera & 2.5inch monitor
Vixen VX-2 (focus adjustment with magnifier)
FUJIFILM SUPER G ACE 800, exposure:20min.

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