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This photo was made using a Canon 200mm lens set at f:5.6 for 1/500 sec. ISO 400, polarizing filter. Note how the background is completely out of focus at the large aperture of f:5.6. Compare this photo with the one shot at f:22. I used f:5.6 instead of the widest aperture of f:2.8 so that I would have a bit of depth-of-filed for the small cluster of leaves. -
This photo was made using a Canon 200mm lens set at f:22 for 1/60 sec. ISO 400, polarizing filter. Note how the background comes more in focus at the small aperture of f:22. Compare this photo with the one shot at f:5.6. -
When maximum sharpness is need in a scene that has very close to distant points in the frame, you will need to use the smallest aperture (largest f-stop number) such as f-22 for maximum depth-of-field (zone of sharpness). -
The setting sun captured through fall colored leaves on the North Lake road about 20 miles west of Bishop California. Sun stars are a phenomenon of diffraction created by stopping the lens down to one of the smallest apertures available. This exposure was 1/15 second at f:16 with the ISO set at 100. The Canon 17-35mm zoom lens was set at 17mm. -
Cascading water in this creek makes a blur because an 8 second exposure is slow enough to allow the water to move during the exposure. This photo was made with an f/stop of 22 on a Canon 28mm lens. -
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