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Digitally Integrated Design, is a designation Tamron puts on lenses featuring optical systems designed to meet the performance characteristics of digital SLR cameras.
The newest fast telephoto zoom from Tamron, the design features 19 elements on 16 groups, including three Low Dispersion (LD) glass elements to minimizing chromatic aberration. This is a member of Tamron's top-line 'Special Performance' range, 'Di' indicates that it is 'Digitally Integrated', It work for both 35mm film, crop sensor and full frame camera, With the "IF" technology, the lens will focus fast and silent internally. Lastly, the 'Macro' description provides a minimum focusing distance of 0.95m. A removable tripod collar is included as a standard component.
Please Note: This lens is for Sony Alpha Digital AF Lens Mount.