A Very Versatile Wide Angle Zoom
Tamron SP AF 17-35mm F/2.8-4 Di LD Aspherical (IF) Lens 17-35mm has turned into the a very versatile wide angle zoom span for SLR cameras. When mounted on a digital body this focal span becomes an
equivalent 25-52mm, which turns this lens into a wide through standard zoom lens. Because it's set up for for full 35mm frame size cameras, vignetting is not an issue. Most full frame design lenses are the height of their sweet spot, when mounted on DX size digital image sensors, while this Tamron lens is no exception.
it's not f2.8 through entire span, but ostensibly Tamron selected this design as a compromise between making it diminutive and light weight. Compared to the Nikon 17-35 f2.8 AF-S, in both weight and extremely attractive price. Naturally, for a few photographers this much plastic is just "overly cheap" and is an unacceptable option. Personally I choose for less weight, if optical specifications are comparable.
The 17-35 appears to be very sharp, while testing confirm the excellent resolution. My sample had very little in the way distortions, although I saw other example of this lens visibly displaying more barrel distortions! I'd guess the manufacturing lenience could be a little lax..
The front element is stationary when focusing, although the focusing ring does rotate and as a consequence it does not support any automatic AF/MF override function, like an AFS Nikkor or a normal Canon EF lens.
The lens hood is a complete waste. It merely reflects way too much light within the internal side. Tamron needs to coat the inside of their hoods for improved light absorption, like most other manufactures do! Fortunately, it seem to have control over flare. although many have a propensity to shield the lens using their hand.
In consideration of an attractive price point, resolution and overall weight, this lens is a lot of value for the price. If you don't care for that much plastic, then think about the need to shell out upwards of $1200 for the authentic Nikkor lens, and perhaps plastic is not all that bad after it's
all said and done.
My issue with every Di XP Tamron lens is the deficient grip for to performing quick lens exchanges. To change this lens, you must consequently turn both the focus and zoom rings to some extent, sometimes a whole bunch... I think that Tamron should make both rings somewhat shorter, and provided a better middle grip to reliably rotate the lens in and out from the camera mount.
Jun 27, 2011.