Canon EOS Digital Rebel EOS DIGITAL REBEL/EOS 300D DIGITAL Instruction Manual - Page 64

When Autofocus Fails Manual Focusing

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When Autofocus Fails (Manual Focusing) Autofocus can fail to achieve focus (the focus confirmation light blinks) with certain subjects such as the following: (a) Low-contrast subjects (blue sky, solid-color walls, etc.). (b) Subjects in low light. (c) Extremely backlit and reflective subjects (car with a reflective body, etc.). (d) Overlapping near and far objects (animal in a cage, 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 and focus manually. Manual Focusing 1 Set the lens focus mode switch to < MF >. Focusing ring Focus on the subject. 2 • Focus by turning the lens focusing ring until the subject is in focus in the viewfinder. • If you press the shutter button halfway during manual focusing, the active AF point and the focus confirmation light in the viewfinder will light when focus is achieved. • If focus cannot be achieved with an external Speedlite's AF-assist beam, select the center AF point. An off-center AF point may not be able to achieve focus. < AF> stands for auto focus. •• stands for manual focus. 64

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64
When Autofocus Fails (Manual Focusing)
Autofocus can fail to achieve focus (the focus confirmation light
<
n
>
blinks) with certain subjects such as the following:
(a)
Low-contrast subjects (blue sky, solid-color walls, etc.).
(b)
Subjects in low light.
(c)
Extremely backlit and reflective subjects (car with a reflective body,
etc.).
(d)
Overlapping near and far objects (animal in a cage, 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.
Set the lens focus mode switch to
<MF>.
1
•
If you press the shutter button halfway during manual focusing, the active
AF point and the focus confirmation light <
n
> in the viewfinder will light
when focus is achieved.
•
If focus cannot be achieved with an external Speedlite’s AF-assist beam,
select the center AF point. An off-center AF point may not be able to
achieve focus.
•
<
AF
> stands for auto focus.
•
<
MF
> stands for manual focus.
Manual Focusing
Focus on the subject.
•
Focus by turning the lens focusing ring
until the subject is in focus in the
viewfinder.
2
Focusing ring