Canon EOS 5D When Autofocus Fails Manual Focusing, Subjects difficult to focus, Viewfinder

When Autofocus Fails (Manual Focusing)

Autofocus can fail to achieve focus (the focus confirmation light <o> blinks) with certain subjects such as the following:

Subjects difficult to focus

(a)Low-contrast subjects

Example: Blue sky, solid-color walls, etc.

(b)Subjects in low light

(c)Extremely backlit and reflective subjects Example: Car with a reflective body, etc.

(d)Overlapping near and far objects Example: Animal in a cage, etc.

(e)Repetitive patterns

Example: Skyscraper windows, computer keyboards, etc.

In such cases, do one of the following:

(1)Focus an object at the same distance as the subject and lock the focus before recomposing.

(2)Set the lens focus mode switch to <MF> and focus manually.

Manual Focusing
1	On the lens, set the focus mode
	switch to <MF>.
2 Focus the subject.
	Focus by turning the lens focusing
	ring until the subject is in focus in the
Focusing ring	viewfinder.

If you press the shutter button halfway during manual focusing, the active AF point and the focus confirmation light <o> in the viewfinder will light when focus is achieved.

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