Canon EF 28-70mm F2.8 L USM Autofocus Zoom Lens - for EOS DSLR's. And now, the Canon EF 24-70mm f/2.8 L II USM Lens has improved upon the version I lens with notably improved image quality. The Canon EF 28-70mm f/2.8 L USM Lens incorporates Ring USM (Ultrasonic Motor) AF.
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