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Re: EF and USM
In Reply to: EF and USM posted by j chokshi on August 16, 2001 at 13:44:43: I think USM is the ultrasonic motor and it operates better to EF Chauhan : During this I came across two different camera kits. : 1. Canon Rebel 2000 body with EF 28-80mm lense : My doubt is what is the difference between terms EF and USM? And which one is better for beginners like me. : Can anyone guide me which one is better? : Thanks, : Jig
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