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Amazing Deal Review - Tamron AF 70-200mm f 2.8 Di LD IF Macro Lens for Canon DSLR Cameras

Internal Focusing (IF) System
Internal focusing provides numerous practical benefits to photographers including a non-rotating front filter ring that facilitates the positioning of polarizing and graduated filters, and more predictable handling because the lens length does not change during focusing. Even more important, Tamron’s Internal Focusing (IF) system provides a much closer minimum focusing distance (MFD) throughout its entire focusing range. In addition, IF improves optical performance by minimizing illumination loss at the corners of the image field, and helps to suppress other aberrations that become more troublesome at different focusing positions.
Product Description

Tamron’s SP AF 70-200mm f/2.8 zoom lens delivers a multi-featured lens with internal focusing while holding the physical lens dimensions to the minimum. With full-size format SLR cameras, this tele-zoom lens covers the full focal length of 70-200mm, and for DSLR cameras with APS-C sized imagers its focal length is equivalent to 109-310mm (with 1.55X approximation).

The lens allows a minimum focusing distance of only 37.4” over the entire zoom range and a maximum macro magnification ratio of 1:3.1 at 200mm.

Items Included:
Tamron SP AF70-200mm f/2.8 Di LD (IF) Macro Lens for Canon
Lens hood
Case
6 year Tamron warranty