Tamron 70-200mm f/2.8 Di VC USD SP G2 Lens - Canon

SP 70-200mm F/2.8 Di VC USD G2 Model A025

All features overhauled to create an accomplished, top-grade high-speed telephoto zoom lens

All-new optical design
Any aberrations thoroughly compensated for resolving power enhanced across the entire zoom range
Minimum Object Distance (MOD) reduced from 1.3m (A009) to 0.95m (A025)
Fully compatible with dedicated tele converters
Excellent backlit performance through the application of eBAND Coating

Improvements of individual functions
The VC system now achieves an image stabilization performance of 5 stops according to the CIPA standard (when using VC MODE 3) and three situation-specific VC modes
Dramatic improvements in AF speed and responsiveness
Moisture-Proof and Dust-Resistant Construction adopted
Fluorine Coating applied to the front surface of the lens element

External design fully overhauled
Uncompromising craftsmanship with careful attention to minute details based on the rigorous quality standards for the SP series
Functional beauty achieved by smoothly combining engineering and design aspects. Exquisite and high-grade design featuring a metal-based barrel

All-new optical design achieving the highest-level performance
The optical design has been completely overhauled in comparison with the previous model (A009), and superior performance and resolution is now ensured across the entire zoom range. Outstanding optical performance that is uniform and well-balanced is maintained, not only in the 70mm wideangle range but also in the middle focal ranges and the 200mm telephoto range. Using the A025 in combination with a dedicated tele converter attached makes it possible to fully enjoy ultra-telephoto photography while maintaining excellent optical performance.

Improved depictive quality in the wide-angle focal range
With transverse chromatic aberrations minimized, improvements have been made in the periphery of the image plane on the wide-angle side. Its deliver the sharpness and high resolution in the periphery.
Improved depictive quality in the telephoto focal range
Deploying the LD lens element has minimized axial chromatic aberrations occurring on the telephoto side.

The optical design of the new A025 consists of 23 elements in 17 groups. 1 XLD (eXtra Low Dispersion) and 5 LD (Low Dispersion) lens elements are used. The optimum deployment of both of these elements completely eliminates chromatic aberrations, which tend to become particularly prominent in high-speed telephoto zoom lenses.

The optical design was completely reworked to better accommodate the higher pixel-density digital cameras of the new era. Considering the need to also maintain excellent image quality when using a tele converter, creative ideas have been incorporated to the utmost to consistently ensure high-level performance. As a result, outstanding resolution and contrast reproduction performance is achieved across the entire zoom range.

For the new A025, the designers placed importance on its spectacular background blur effects, a significant factor comprising the depictive quality of a high-speed telephoto lens. Soft, beautifully-tune d background blur effects (bokeh) worthy of a high-speed lens have been achieved as a result. Both the sharp, clear images in the area in focus and the impressively smooth and soft transition to the background accentuate the main subject in an attractive manner in portrait photography, etc