Ergonomics

When I first took the lens out of the box I was surprised at how small and light it is. At 3.8 in. and weighing only 15.9 oz that makes it only slightly longer and significantly lighter than their 28-75mm f/2.8 (3.6 in, 18.0 oz.). To compare with the competition, neither Nikon nor Canon make a lens that falls in this range, but their closest equivalents are significantly larger and heavier. The most similar lens I could find was the Sigma 18-260mm which is 4 in. and 22.24 oz, a pretty big difference.

So what’s the tradeoff for having such an enormous zoom in such a small package? I’m sure there are a lot of technical details that could answer that question more specifically, but the main aspect that affects us as photographers is that it’s not a very fast lens—with a maximum aperture of f3.5-6.3. Other features of this lens are a minimum aperture of f22-40, Vibration Reduction (which Tamron calls Vibration Compensation, or VC) and an Ultrasonic Silent Drive for fast and quiet autofocus,

Have in mind about that the D90 substance costs you around $900 brand name new, and the methodical bonus of the 18-200 vr is $650. How many chances can you get discount like this. This one is extraordinarily eulogistic for those who don't insufficiency to pay tax when purchasing in amazon. Yay for camera, I'd always go with Amazon, B&H and J&R. On ebay, you may get a (miniature) mastery extent, but you've got to put yourself way more touchy. If I hadn't bought d300 recently, I'd have meditation of it candidly.