Tamron 70-300 USD Question

Started Apr 4, 2012 | Discussions thread
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jadawgis732
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Tamron 70-300 USD Question
Apr 4, 2012

Does anyone notice their 70-300's USD (ultrasonic drive) autofocus is a little less silent and produces more vibrations when autofocusing at 70mm than at 300mm?
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Sony SLT-A57 Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) Sony DT 50mm F1.8 SAM Tamron SP 70-300mm F/4-5.6 Di USD
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