Tamron's SP AF17-50mm F/2.8 XR Di II VC LD Aspherical (IF) is a high-speed, wide-to-moderate-telephoto zoom lens designed for Nikon digital SLR cameras with smaller sensors. It covers the very popular 17-50mm focal length range (equivalent to 26-78mm in the full-frame 35mm format) making it extremely versatile. Tamron's Vibration Compensation (VC) mechanism minimizes the effects of handheld camera shake (up to 4-stops), providing a means to great low-light shooting.
The lens delivers impressive sharpness and striking contrast over its entire focal length and aperture range. A maximum aperture of f/2.8 delivers images enhanced by shallow depth-of-field, and smooth, natural transitions in out-of-focus areas of the image.
Di II Lenses are designed for exclusive use on digital cameras with smaller-size imagers. These lenses are not designed for conventional cameras or digital cameras with image sensors larger than 24mm x 16mm.
Lens Construction (Groups/Elements): 14/19
Angle of View: 78°45'-31°11' (APS-C size equivalent)
Type of Zooming: Rotation
Diaphragm Blade Number: 7 (Circular apertures)
Minimum Aperture: F/32
Minimum Focus Distance: 11.4in.(0.29m)
Macro Magnification Ratio: 1:4.8
Filter Diameter: ř72
Weigh:t 570g (20.15oz)
Diameter x Length : ř3.13 x 3.7in.
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