Program Shift allows you select specific aperture and shutter speed combinations when you’re in a fully-automatic Program mode. Program shift features usually work like this: in Program mode, press the shutter button halfway to meter and lock focus. Now, adjust the Program shift control. The camera will automatically cycle through all reciprocal shutter speed/aperture combinations for that particular exposure. So, you end up with the same level of exposure, but you can choose between a shutter speed/aperture combo that has a faster or slower shutter speed, or larger or smaller aperture. Program shift gives you a great degree of manual control, even when you’re in a fully automatic program mode. Consult your camera manual for details.
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