Canon 3.5-4.5 USM Instruction - Page 5

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Mounting and Detaching the Lens

See your camera's instructions for details on

mounting and detaching the lens.

¡After detaching the lens, place the lens with the

rear end up to prevent the lens surface and

electrical contacts from getting scratched.

¡If the contacts get soiled, scratched, or have

fingerprints on them, corrosion or faulty

connections can result. The camera and lens

may not operate properly.

¡If the contacts get soiled or have fingerprints on

them, clean them with a soft cloth.

¡If you remove the lens, cover it with the dust

cap. To attach it properly, align the lens mount

index and the ¢ index of the dust cap as shown

in the diagram, and turn clockwise. To remove

it, reverse the order.

To shoot in autofocus (AF) mode, set the focus

mode switch to AF.

To use only manual focusing (MF), set the focus

mode switch to MF, and focus by turning the

focusing ring. The focusing ring always works,

regardless of the focus mode.

After autofocusing in ONE SHOT AF mode, focus

manually by pressing the shutter button halfway

and turning the focusing ring. (Full-time manual

focus)

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