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Friday, September 11, 2009

Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro Zoom Lens for Canon DSLR Cameras

With the advent of the latest 15X zoom lens from Tamron, the pioneer of high power zoom lenses, the high power zoom lens has steadily evolved from a 7.1X to a 10.7X to a 13.9X and now to the worlds largest zoom ratio of 15X by combining advanced high power zoom design technologies accumulated by Tamron since 1992. The lens covers an angle of view equivalent to that of a 28mm wideangle to a 419mm ultra telephoto with just one lens, letting the user capture once-in-the-lifetime images of panoramic landscape images or close-up pictures of children smiling, without having to get too close to the subject and without having to change lenses.

Technical Details :
* Flower-shaped lens hood accessory included.
* Minimum focusing distance of 0.49m over the entire zoom range for the maximum magnification ratio of 1 - 3.5.
* Zoom lock mechanism for convenience in carrying the outfit.
* New outer design matches the newest generation high power zoom lens in the digital era.
* 7 Diaphragm Blades.

Camera shake can ruin your photos, particularly when taking telephoto shots or shooting in low light conditions. The Tamron 18-270mm f/3.5-6.3 macro zoom lens, however, fights camera shake with its state-of-the-art vibration compensation (VC) mechanism, which delivers blur-free handheld images for incredible results. The proprietary VC mechanism employs a three-coil system that moves the VC lens electromagnetically based on signals originating from the movement of three steel balls. The lens element that compensates for vibration is held in place by the balls, so there is little friction and the movement is quite smooth. The end result is a technology that makes it possible to create exceptional images at slower shutter speeds under conditions where a tripod used to be necessary. You can also use subject movement to good effect with the lens, bringing out the contrast between motion and stillness, or shoot without a flash to evoke the genuine atmosphere of the scene.
The lens covers an extremely broad range of focal lengths, from an extra-wide 18mm length to a telephoto 270mm length (the 35mm equivalent of 28mm to 419mm). The resulting 15x zoom ratio is the world's largest, representing a wide cross section of Tamron high-power zoom design technologies. Plus, the vibration compensation works throughout the entire zoom range, giving you the freedom to create a wide variety of images. The lens lets users capture once-in-a-lifetime panoramic landscape images or close-up pictures of children smiling, all without getting too close to the subject or changing lenses. Other details include a macro magnification range of 1:3.5, a minimum focusing distance of 19.3 inches, and a 72mm filter diameter.

1. The lens is smaller than expected.
2. The focus ring moves smoothly in manual mode.
3. The VC does jump a bit at first but stabilizes quickly.
4. The zoom seemed a bit stiff when first tried it but didn't noticed it when actually shooting.
5. The zoom ring moves in the opposite direction as my canon lenses!
6. There is significant distortion at 18mm -- no big surprise. But at 35mm, I noticed an unusual distortion as well. This isn't a lens for architecture images.
7. The lens produces warmer images.

Tamron AF 18-270mm f/3.5-6.3 Di II VC LD Aspherical IF Macro Zoom Lens for Canon DSLR Cameras

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