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Does the manual focus ring of a EF-S USM lens (17-55mm f/2.8 IS) need electricity to work?

Started Jan 16, 2017 | Discussions thread
GordonAtWork
GordonAtWork Regular Member • Posts: 482
Re: Does the manual focus ring of a EF-S USM lens (17-55mm f/2.8 IS) need electricity to work?
1

Hi,

The USM on this lens is the ring type and will allow full manual focus without power.

It's the aperture you will have problems with as it's electronically driven so the lens will have to be used wide open.

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