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Tamron 70-200mm f/2.8 Di Macro

Tamron 70-200mm f/2.8 Di Macro Specifications
Frame Coverage 35mm
Lens Construction (groups) 13
Lens Construction (elements) 18
No. of Diaphragm Blades 9
Minimum Aperture 32
Closest Focusing Distance .95m (37.4")
Maximum Magnifcation 0.13x
Filter Diameter 77mm
Maximum Diameter x Length 89.5mm x 194.3mm (3.5" x 7.6")
Weight 1150g (40.6oz)
The Tamron AF 70-200mm f/2.8 SP LD Di [IF] macro showed a very good performance during our APS-C format tests and it is only slightly worse in the full format scope. The center performance is very good at f/2.8 and excellent at medium aperture settings. The border/corner quality remains very high at 70mm and it's still decent beyond.
Price is obviously the major consideration when considering a lens in this category, and with exceptional results for image quality, it's not just about the money when considering the Tamron 70-200mm ƒ/2.8. Sharpness results meet and even exceed those for ''brand-name'' manufacturers, however the concession is build quality and autofocus speed.
Overall, and especially for the price, I'm very pleased with the image quality of the Tamron 70-200mm f/2.8 Di Macro Lens. On the wide end (70mm), this lens is sharp wide open (f/2.8) across the entire 35mm frame. Stopping down only makes a small improvement in sharpness - reduced vignetting is the primary difference seen.
The SP AF 70-200mm F2.8 Di LD (IF) Macro is certainly a very creditable effort by Tamron to produce a high quality, yet affordable fast telephoto zoom. Indeed if we look solely at the studio optical tests, it is a resounding success, as the technical quality of the images this lens can produce is superb throughout most of the range, matching or even outperforming the much more expensive Canon 70-200mm F2.8 L IS USM.
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