How to shift the exposure
f/2.8, 1sec
This flower was shot indoors in low light. The camera, in Program mode, selected the largest aperture on the lens to give the fastest possible shutter speed. This is Program mode's default approach when light levels are low.
However, the shallow depth of field created by the aperture of f/2.8 means that only a fraction of the flower appears sharp.
f/16, 30secs
A smaller aperture would increase the depth of field, but that would require a much slower shutter speed.
In this instance, that wouldn't be a problem because the camera was on a tripod, so we rotated the control dial to enter Program Shift mode, and selected a small aperture/slow shutter speed combination. Note the overall exposure level stays the same.
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