180° star trails around Polaris

A full 180° star trails around Polaris can be obtained in a limited period of the year, near the winter solstice. WARNING: staring at this photo may make you dizzy!

Technical Data
Optics Sigma 18-200 objective
Focal Lenght 18 mm
Focal Ratio f/6.3
Exposure Time 708 single exposures of 60 s
Digital camera
Canon EOS 350D
Sensitivity 400 ISO
Location Tradate (VA) at 305m
Date and time of exposure start 28 december 2007, 17.40 UT
Mount Fixed tripod
Tracking -
Temperature and humidity T=-1°C, RH=70%
Notes Sum of the single images with ImageStacker

HTML Editing and Publishing by Lorenzo Comolli. Email me at comolli@libero.it.
Back to Main Page