In the programmed AE mode, "60" will appear in the viewfinder as the "camera shake" warning for 1/80 sec.,
while "250" warns you that the speed has actually dropped below 1/200 second.
(A) Shutter Speed Priority Crossover AE Variation
This chart shows the pattern used by the
camera's microprocessor to maintain the
selected shutter speed for as long as possible
in relation to the lens aperture and the lighting
conditions.
When shooting bright scenes at 1/125 sec., for
example, the camera maintains the preset
shutter speed until the minimum aperture
(f/16) is reached, then shifts to a faster shutter
speed. For dark scenes, it holds the set shutter
speed until the lens opens to maximum
aperture, and then shifts to a slower one to
ensure a proper exposure.
The Crossover System also corrects any
mistakes you might make in setting the
shutter speed. If the shutter speed is set at
1/15 sec., which is too slow for a 50mm lens,
the Crossover System automatically alters the
speed to 1/30 sec., the "camera shake" limit
for a 50mm lens, and maintains the exposure
pattern indicated by the thin broken line.4www.butkus.org
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