Using Power Focus (PF) Mode on the EF 600mm f/4L IS III USM lens

Article ID: ART174559

Date published: 05/30/2019

Date last updated: 05/30/2019

Power Focus (PF) Mode

By using power focus, you can turn the playback ring to change the focus smoothly.
This is a useful feature for changing focus when shooting movies.

		Set the focus preset switch to OFF, and the focus mode switch to PF.
		Turn the playback ring manually to change the focus.

You can make a 2-step change in power focus speed, depending on how much the playback ring is turned.

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