Athabasca River at Wabasso Campground, Jaspter Park, Alberta Canada 23 Aug 1998 50mm f/1.4 Canon lens, Fuji Reala 100 1 minute exposure steps increasing 1/2 stop aperture per step Total exposure 16 minutes

Dipper Exposure Trails photo by Derek Olson Ever the artistic experimenter, my 14-year-old son Derek made this portrait of the Big Dipper. After opening the shutter, he reduced the lens aperture by 1/2 stop each minute. The result is a short set of startrails of decreasing brightness making each star look like a speeding comet! Some clouds drifted across the view during the time the shutter was open, their motion making them ghost clouds reflecting the deep red of the summer twilight.

Copyright 2000-Feb-20 Thor Olson

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