The Tamron 17-35mm f.2.8~4 wide angle zoom lens is a recent addition to the Tamron line-up. To give it its full title, the lens is the Tamron SP AF17-35mm F/2.8-4 Di LD Aspherical [IF] Model A05
Tamron SP AF 17-35mm F/2.8-4 Di LD Zoom Lens
Unscrambling the alphabet soup indicates that this is a high-tech optic:
SP - Designation given to Tamron's top line of lenses
Di - Digitally optimised lens, with reduced chromatic aberrations, and improved rear element coating to reduce back-scatter of light from the digital sensor. (Note that unlike the Dx Nikkors which have a reduced image circle for the small APS sized Nikon sensors, Tamron's Di series have an image circle sufficient for the full 36x24mm frame of a 35mm camera).
LD - Low Dispersion glass for improved sharpness and contrast.
Aspherical lens element(s) for reduced aberrations.
IF - Internal focusing - the length of the lens does not change, and the front element does not rotate while focusing.
This review arises from approximately two week's use of the lens in a wide variety of settings. However, no formal classical testing was undertaken. Rather, the results are from my subjective experience and the results of "real world" pictures taken.
|Angle of view||104°-63°|
|Lens construction||14 elements in 11 groups, including 3 aspherical and 1 LD glass element|
|MOD (minimum object distance)||0.3m (11.8") throughout entire zoom range|
|Maximum magnification ratio||1:5.4 (at 35mm)|
|Overall length||86.5mm (3.41")|
|Maximum diameter||83.2mm (3.28")|
|Number of diaphragm blades||7|
|Standard accessory||Flower-shaped hood|
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