Canon EOS 66 - When Autofocus Fails

When Autofocus Fails
The camera has a high-precision AF system which can focus almost all
subjects. However, it can fail to achieve focus (the in-focus indicator <•>
blinks) the subjects listed below.^
Difficult Subjects for Autofocusing
• Low-contrast subjects. Example: Blue sky, flat surface with a solid color.
• Subjects In very low light.
• Extremely backlit or reflective subjects. Example: Automobile with a
highly reflective finish.
• Overlapping near and far objects. Example: Animal behind bars In a cage.
In such cases, use one of the following methods to focus:
(1) Focus lock an object at the same distance as the subject and
recompose.
(2) Set the lens focus mode switch to <MF> or <M> and focus manually as
explained below.
S If focus cannot be achieved even with the EOS-dedicated Speedlite’s AF-assist
light, select the center focusing point instead of an off-center focusing point.
MF
Manual Focusing
Set the lens focus mode switch to
<MF> (or <M> on older lenses).
*• The <GiQ> Icon will be displayed on
the LCD panel.
Focus the subject.
• Turn the lens manual focusing ring
until the subject Is in focus in the
viewfinder.
S If you focus manually while you hold down the shutter button halfway, the AF
frame(s) achieving focus will flash in the viewfinder and the in-focus indicator
<#> will also light.
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