Difficult Subjects For Autofocus - Canon EOS 1 Instructions Manual

M. Difficult Subjects for Autofocus
Although the AF system of the camera is very
accurate, it is not perfect. The following subjects
are difficult for autofocus. When AF is impossi-
ble, the green AF symbol will blink in the view-
finder.
(0)
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SUBJECTS
-Low contrast subjects (misty scenes,
light-colored, or white objects) ... .. . . (A)
-Subjects in extremely low-light situations
(a dark room, night scenes) . .. ...... (8)
-Subjects with an object in front of them
(caged zoo animals) . ...... . .. . .... (C)
-Subjects having generally horizontal
patterns . ... ...... ... ...... .. .. . . (0)
-Subjects with bright spectral reflections (shiny
metal, snow, ice, surface of a lake)
-Subjects in extremely strong backlight
-Fast-moving subjects
(difficult to keep within the AF frame) ,
.
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