|
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!
|
|
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 |
|