Introduction It has been several years since Tamron introduced the high-speed, full-frame SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro standard zoom for serious amateurs and professionals. In that time the number and popularity of full-frame DSLRs has increased dramatically, in part owing to the debut of video capture but also due to a number of more accessibly priced camera models. In spite of this, both Canon and Nikon have yet to fully address the need for a high-speed standard zoom offering image stabilization for both stills and video.Of those two Canon is perhaps