MAJOR FEATURES VC (Vibration Compensation) mechanism reduces lens shake
The proprietary VC (Vibration Compensation) mechanism developed by Tamron features a three-coil system using three pairs of driving coils and steel balls around the compensator group of the lens' optical system. Since the compensator lenses are supported with rolling friction of the balls, the response performance is enhanced and the construction is simple, which results in the compactness of the lens. The lens incorporate a highly accurate gyro sensor for detecting hand-shake, which, combined with a 32-bit RISC CPU, offers comfortable anti-vibration effects. Outstanding design combines high zoom power, VC mechanism and compact size
The AF28-300mm F/3.5-6.5 XR Di VC integrates optical technologies that Tamron has accumulated as the pioneer and leader of high power zoom lenses in order to realize the desired compactness even while incorporating the VC mechanism. The optical system uses a number of lens elements made from special optical glass materials including XR (high refraction index) glass elements, GM (glass-molded aspherical lens) elements, hybrid aspherical elements, LD (low dispersion) glass elements to compensate for on-axis and lateral chromatic aberrations and AD (anomalous dispersion) glass element. The lens offers high contrast, high resolution performance and flatness of the image field as a one-does-it-all zoom lens designed to match the characteristics of DSLR cameras. Revolutionary MFD of 0.49m (19.3") throughout the zoom range provides 1:3 macro magnification ratio
The AF28-300mm F/3.5-6.3 XR Di VC LD MACRO boasts an MFD (minimum focusing distance) of 0.49m (19.3") over the entire zoom range, a top-class closing focusing capability among high power zoom lenses for full-size format SLR cameras, which provides the remarkable maximum macro magnification ratio of 1:3 at the 300mm telephoto end. Internal surface coatings minimise ghosting and flare
The use of internal surface coatings (i.e. multiple-layer coatings on cemented surfaces of plural elements) and multiple-layer coatings prevent reflections from lens surfaces, ghosting and flare due to reflections that occur when light enters through the front element. Reflections caused by the imager itself in the mirror box are reduced to the absolute minimum. Ultra-high zoom power in a lightweight, compact design thanks to new mechanical devices
Tamron has reviewed the roles that respective barrel parts play in order to achieve the high power, compactness and light weight. As a result, dimensional increases are confined to a mere 17.8mm (0.7") in overall length and about 5mm (0.2") in diameter, when compared with the existing AF28-300mm (Model A061), despite the incorporation of the VC mechanism. Zoom Lock mechanism for enhanced portability
The zoom lock prevents unwanted barrel extension when carrying the lens/camera combination over the shoulder. Flower-shaped lens hood
A flower-shaped lens hood is included as a standard accessory. The special hood provides optimum shading of superfluous light rays that enter from the rectangular frame outside the image field. SPECIFICATIONS | Model no. | A20 | | Focal length | 28-300mm | | Maximum aperture | f/3.5–6.3 | | Angle of view | 75°23'–8°15' | | Lens construction | 18 elements in 13 groups | MOD
(minimum object distance) | 0.49m throughout entire zoom range | | Maximum magnification ratio | 1:3 (at f=300mm, MOD=0.49m) | | Filter size | 67mm | | Overall length | 99mm* | | Maximum diameter | 78.1mm | | Weight | 555g* | | Number of diaphragm blades | 9 | | Minimum aperture | F/22–F/40 (28mm–300mm) | | Supplied accessory | Flower-shaped hood | | Mounts available | Nikon AF-D | * Values given are for Nikon AF-D models. The cosmetic design and specifications are subject to change without notice. |
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