Canon EOS 850 - Manual (Page 34)

Although the autofocus system is very ac­
curate, there are some subjects that present
some difficulty.
1) Subjects with low contrast (misty scenes,
light-colored or white objects).
2) Subjects with extremely low-light situa­
tions (a dark room, night scenes).
3) Subjects having generally horizontal pat­
terns (window blinds).
4) Subjects in extremely strong backlight
with strong reflections.
5) Subjects with an object in front of them
(caged animals).
6) Fast-moving subjects (difficult to keep
within the AF frame).
4. Autofocus Considerations
37