[unable to retrieve full-text content]Competition includes the Canon EF 70-200mm f/4L IS USM ($1149 USD), Nikon AF-S NIKKOR 70-200mm f/4G ED VR ($1396.95 USD), and the Tokina AT-X 70-200mm f/4 PRO … The Tamron 70-210mm F/4 Di VC USD retails for $799 USD and is available to pre-order in both Canon and Nikon mounts.