Canon EF 400mm f/2.8L IS III USM EF400mm f/2.8L IS III USM Instructions - Page 10

Setting the Focusing Distance Range

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4. Setting the Focusing Distance Range Focusing distance range selector switch You can set the focusing distance range with a switch. By setting a suitable focusing distance range, the actual autofocusing time will be shorter. Focusing distance range ① FULL (2.5 m - ∞) ② 2.5 m - 7 m ③ 7 m - ∞ ENG-9

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ENG-9
4. Setting the Focusing Distance Range
You can set the focusing distance range with a
switch. By setting a suitable focusing distance
range, the actual autofocusing time will be
shorter.
Focusing distance range
①
FULL (2.5 m –
∞
)
②
2.5 m – 7 m
③
7 m –
∞
Focusing distance range selector switch