Shooting Conditions That Make Focusing Difficult - Canon EOS 650D Instruction Manual

Changing the Autofocus Method (AF Method)
Shooting conditions that make focusing difficult
® Low-contrast subjects such as the blue sky, solid-color fiat surfaces
or when highlights or shadow details are lost.
® Subjects in low light.
® Stripes and other patterns where there is contrast only in the
horizontal direction.
® Subjects with repetitive patterns (skyscraper windows, computer
keyboards, etc.).
® Fine lines and subject outlines.
® Under a light source whose brightness, color, or pattern keeps
changing.
® Night scenes or points of light.
® When the image flickers under fluorescent or LED light sources.
® Extremely small subjects.
® Subjects at the edge of the picture.
® Subjects strongly reflecting light.
® The AF point covers both a near and faraway subject (such as an
animal in a cage).
® Subjects that keep moving within the AF point and cannot keep still
due to camera shake or subject blur.
® A subject approaching or moving away from the camera.
® Autofocusing while the subject is very far out of focus.
® Soft focus effect is applied with a soft focus lens.
® A special effect filter is used.
d_
_'_ _ If focus is not achieved with the above shooting conditions, set the lens
focus mode switch to <MF> and focus manually.
If you use AF witt" any of the following lenses, using [Ouick mode] is
recommended. Autofocusing with [_+Tracking], [FlexiZone - Multi] or
[FlexiZone - Single] may take longer or correct focus may not be
achieved.
, EF24mmf/2.8 * EF28-90mm f/4-5.6 Ill
• EF35mmf/2 • EF55-200mm fi4.5-5.6 USM
• EF50mmf/2.5 Compact Macro * EF90-300mm fi4.5-5.6
, EF100mm f/2.8 Macro * EF90-300mm f/4.5-5.6 USM
• EF135mm f/2.8 (SoftFocus)
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