Polar rotation

The stars draw perfect arc of circumference, with in the center the Polar Star.
 

Technical Data
Optics Photographical objective
Focal Lenght 50 mm
Focal Ratio f/5,6
Exposure Time 4 hours exposure
Film Kodak Elite 100
Developement sensibility 100 ISO
Location Colle del Nivolet (AO, in the Italian Alps) at 2600m
Date and time of exposure start 18 september 2000, 22.00 UT
Mount Fixed tripod
Tracking -
Notes -


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