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Pentax SLR Lens Discussion Discuss any Pentax K-mount, screwmount, or medium format SLR lens, as well as filters and attachments.

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07-22-2008, 12:01 PM   #1
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USM lenses and battery life
Has anyone noticed a change in battery life when using an SDM lens? Would the lens motor use more (or maybe even less) power than the camera motor?
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