Canon EOS 620 - 650 camera manual

5.Comparison between AF Mode and Film Winding Mode (in the evaluative metering mode)

6. Program Line (program characteristics)

This camera is equipped with the advanced "Intelligent Program AK" which chooses the best shutter speed/aperture combinations, taking the lens focal length into account. When the automatically-set shutter speed becomes O to 0.5 steps below 1/focal length of the lens in use, the camera-shake warning sounds. The shutter speed of 1/focal length of the lens is generally said to be the limit for hand-held shooting.

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