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Focal length: 17mm (equivalent to 26mm)
Exposure: F/16 1/10 sec ISO200 WB: Auto Handheld photography The renowned VC image stabilization mechanism developed in-house by Tamron is truly state-of-the-art. By building VC into fast, constant-aperture F/2.8 normal zoom lens, the resulting synergy has resulted in a lens optimized to deliver top-notch performance in practically any shooting situation. Lens components have also benefitted from advances in production technology, resulting in greater precision, reduced weight and enhanced strength. And since the VC compensator lens moves parallel to the image plane via electronic control alone, the mechanism is simplified and the lens itself is more compact. The new BBAR (Broad-Band Anti-Reflection) coatings adopted reduce internal lens reflections and dispersion that cause ghosting and flare. The coatings enhance light transmission in both the short and long wavelength ranges, ensuring excellent performance in virtually any shooting condition. Additionally, specially formulated internal surface coatings have been applied to the cemented surfaces of all lens elements to ensure sharp, high-contrast images and flawless color reproduction. Various aberrations are corrected with the use of special XR (Extra Refractive Index) glass. The optimum placement of three compound aspheric elements has resulted in a more compact optical system overall while maintaining uniformly high imaging performance. Two LD (Low Dispersion) lens elements are also employed to effectively correct axial chromatic aberrations, which particularly important at the longer focal lengths, and chromatic aberrations of magnification, which occur primarily at the wide-angle end. Using these high-value glass materials with their own special properties for multiple elements has enabled us to design a lens that captures extraordinarily sharp images over the entire zoom range. With an optical system designed exclusively for optimum performance on digital SLR cameras with APS-C size image sensors, the angular coverage range of this lens is impressive. And even though it has a built-in VC image stabilization system, it still delivers a close minimum focus distance of 0.29m (11.4 in) across the entire zoom range. In short, it allows you to enjoy serious, high-quality macro photography with unaccustomed convenience.
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