When autofocus fails, Set the lens focus mode switch to, Focus the subject – Canon EOS 3000 N User Manual
Page 40: Manual focusing
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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.
Difficyft 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.
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.
Manual Focusing
Set the lens focus mode switch to
< M f >
(or <!VI> on older lenses).
> The <ISS> 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.
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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