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To sandpiper: F20	Alan_Kolnik	::	2004-10-12 9:22
The picture was taken with a Nikon D70 and Sigma 70-300 mmm f/4 - f/5.6 APO lens, which has a smallest aperture of f/22. I set the shutter speed to various speeds to capture alternative versions of this scene, and the camera controlled the lens aperture - in this case, f/20. It can vary the aperture between the two extremes to ensure the correct exposure. The data is taken from the EXIF of this picture and enters the TrekEarth fields automatically when I upload the picture.			United StatesUnited States Rapids at Great Falls, MD Alan_Kolnik (397) *
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Thread	Username		Date
To sandpiper: F20	Alan_Kolnik (397)	::	2004-10-12 09:22