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Diana Hall
Third Place
2005 OAPT Members Photo Contest
Head in Clouds!
These two photos were taken early in the morning from the same spot in Kananaskis National Park, Alberta. They were taken with a low-end digital camera with only automatic focussing and shutter speed selection. The first photo was taken with no. The second was taken with the zoom.
The camera judges the shutter speed based on the average light from the entire field of view. A longer shutter speed lets more light into the camera to create the image. In the first photo, the total field of view is on average darker than in the second photo. The camera selects a longer shutter speed in order to allow enough light in to create an image. For the foreground the result is more visible detail. For the clouds in the valley the results is overexposure and loss of detail.
In the second photo the field of view is on average brighter and so the camera selects a lower shutter speed. With less time exposure, more details are visible from the clouds in the valley however less detail is visible in the foreground and it appears totally black.
When you look at the valley in person, the clouds are the attraction and so the second photo brings more attention to this feature and makes for a more dramatic photo. Photographers must constantly be judging the light in such away to get the desired artistic effects.