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Cop y, Internal extender switch – Canon EF 200-400mm f4L IS USM Extender 1.4x User Manual

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10. Internal Extender Switch

The extender switch lever allows you to set the focal distance of the lens to 1.4x.

Slide the extender switch

lock toward the front of the

lens.

This allows the extender

switch lever to move.

Use the extender switch

lever to select a focal

distance of either 1x or 1.4x.

This allows you to change the

focal distance of the lens to

either 1x or 1.4x.

Slide the extender switch

lock toward the back of the

lens.

This locks the extender switch

lever in place.

The extender switch lock prevents the extender switch lever from being moved inadvertently. It does not

secure the switch lever to the side edge. Be sure to use the lock even when the switch lever is set at 1x in

order to prevent it from being moved inadvertently.

When the internal extender is used (set to 1.4x), the AF speed will become slower to retain proper control.

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