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17-50mm f/2.8 XR Di-II LD Aspherical IF Lens - Nikon Mount

Part #: AF016NII700
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The Tamron SP AF17-50mm f/2.8 XR Di II LD Aspherical [IF] Lens made for the Nikon SLR system incorporates a motor built into the lens itself, which gives it the capability to autofocus with all Nikon DSLR cameras (including the D40 and D40x). In addition, with the motor built into the lens, focusing will be quieter and more responsive. The focal length of this lens is equivalent to approx. 26-78mm in 35mm format.

This lens offers an f/2.8 maximum aperture throughout the entire zoom range, to ensure stress-free photographic shots at all focal lengths and distances. Additionally, a broader photographic expression through the use of faster shutter speeds as a result of the maximum aperture offers enhanced photographic pleasure.

  • Optimized for Digital SLR - The use of XR (Extra Refractive Index) glass optimizes the overall distribution of optical power, and also reduces various aberrations to the absolute minimum while achieving remarkable compactness. In addition, suitable positioning of two hybrid aspherical elements serves to maintain imaging performance and to shorten and compress the entire optical system.
  • LD Glass - An LD (Low Dispersion) glass element is used to accomplish effective compensation of on-axis and lateral chromatic aberrations, a critical factor for enhancing optical quality in digital photography, in order to achieve outstanding optical performance over the entire zoom range.
  • Enhanced Peripheral Illumination - Peripheral light fall-off is minimized when compared with that of conventional lenses for film cameras, so images are uniformly bright from the center to the periphery.
  • Internal Surface Coating to Reduce Ghosting and Flare - By employing "Internal Surface Coatings" (i.e., multiple-layer coatings on cemented surfaces of plural elements) and multiple-layer coating technology on ordinary elements, ghosting and flare due to the reflections that occur when light enters through the front element and reflections caused by the imagers themselves are reduced to the absolute minimum.
  • Zoom Lock Mechanism - The Zoom Lock prevents unwanted barrel extension when carrying the lens/camera combination.

Essential Accessories

  • Lenspen - LP-1 Lens Cleaning Brush
  • Dot Line Corp. - 67mm Snap Cap Lens Cap
Lens Information
Camera Mount Nikon
Focal Length 17-50mm
Aperture Range f/2.8-f/32
Minimum Focusing Distance 10.6 in.
Filter Size 67mm
Groups 13
Elements 16
Diagonal Angle Of View 78-31°
Length 3.2 in.
Maximum Diameter 2.9 in.
Weight 0.95 lbs.
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