May 19, 2008 -
Compatible with full-size SLR cameras, AF28-300mm F/3.5-6.3 XR Di VC LD Aspherical Macro Lens features Vibration Compensation mechanism, which uses 3 pairs of driving coils and slide balls around compensator group of optical system. Lens incorporates gyro sensor for detecting hand-shake, which, combined with 32-bit RISC CPU, offers anti-vibration effects. Minimum focusing distance is 19.3 in. over zoom range and max macro magnification ratio is 1:3 at 300 mm telephoto end.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Tamron Announces AF28-300MM VC Lens Equipped with Built-In AF Motor for Nikon SLR Cameras (Model A20NII)
High Power Zoom Lens with Built-in Advanced VC Mechanism, Covering 465mm-Equivalent Angle of View* and Designed for All SLR Cameras
May 15, 2008, Commack, NY - Tamron USA, Inc. announced release of the AF28-300mm F/3.5-6.3 XR Di VC LD Aspherical (IF) MACRO, a high power zoom lens compatible with full-size SLR cameras, now features a built-in AF motor for use with Nikon DSLRs (Model A20NII) and featuring Tamron's proprietary VC (Vibration Compensation) mechanism.
Since its introduction in October 2007, Tamron's AF28-300mm VC zoom lens has been highly evaluated by many photographers the world over as a compact and high power zoom lens providing a 4-stop shutter speed advantage when VC is turned on. The lens covers an angle of view equivalent to that of a 465mm ultra telephoto lens when mounted on a digital SLR camera equipped with an APS-C size image sensor. The ultra telephoto range is one where Tamron's proprietary VC (Vibration Compensation) mechanism exhibits its compensation performance to the maximum extent. The lens enables the user to enjoy ultra telephotography with amazingly stabilized viewfinder images. Covering an angle of view equivalent to 43mm at its wideangle end, the lens lets the user respond to a wider variety of scenes than do tele-zoom lenses in the 70-300mm class.
The AF28-300mm F/3.5-6.3 XR Di VC (IF) MACRO is a compact and high power zoom lens that can be used as a standard zoom. It allows not only the users of conventional film SLR cameras and full frame DSLRs, but also owners of digital SLR cameras equipped with APS-C sized image sensors to comfortably enjoy SLR photography with 465mm-equivalent ultra telephoto without hand shake.
*35mm-format equivalent. When used on digital SLR cameras equipped with APS-C sized image sensors. When mounted on a digital SLR camera equipped with an APS-C sized image sensor. 35mm format equivalent (Tamron's conversion value is 1.55x)
o VC (Vibration Compensation) Mechanism Reduces Hand-shake
The proprietary VC (Vibration Compensation) mechanism developed by Tamron features a triaxial configuration using three pairs of driving coils and slide 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 incorporates a highly accurate gyro sensor for detecting hand-shake, which, combined with a 32-bit RISC CPU, offers comfortable anti-vibration effects. The result is a lens that offers excellent vibration compensation-4 extra stops can be gained when VC is turned on.
o Outstanding Design Realizing High Zoom Power, VC Mechanism and Compactness
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) 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.
o Revolutionary 19.3" MFD Throughout Zoom Range Provides 1:3 Macro
The AF28-300mm F/3.5-6.3 XR Di VC MACRO boasts an MFD (minimum focusing distance) of 19.3" (0.49m) over the entire zoom range, a top-class close 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.
o Internal Surface Coatings Minimize Ghosting and Flare
Through the use of "Internal Surface Coatings" (i.e., multiple-layer coatings on cemented surfaces of plural elements) and multiple-layer coatings to prevent reflections from lens surfaces, ghosting and flare due to reflections that occur when light enters through the front element as well as reflections caused by the imager itself are reduced to the absolute minimum.
o Ultra-High Zoom Power, yet Lightweight and Compact Design
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 0.7" (17.8mm) in overall length and about 5mm in diameter, when compared with the existing AF28-300mm (Model A061), despite the incorporation of the VC mechanism.
o Zoom Lock Mechanism for Enhanced Portability
The zoom lock prevents unwanted barrel extension when carrying the lens/camera combination over the shoulder.
o 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 Name A20
Focal Length 28-300mm
Maximum Aperture F/3.5-6.3
Angle of View 75°23'-8°15'
Lens Construction 18 elements / 13 groups
Minimum Focusing Distance 19.3" (0.49m) (entire zoom range)
Maximum Magnification Ratio 1:3 (at f=300mm, MFD=0.49m)
Filter Diameter 67mm
Overall Length 3.9" (99mm)
Maximum Diameter 3.06" (78.0mm)
Weight 19.6oz (555g)*
Diaphragm Blades 9 blades
Minimum Aperture F/22~F/40 (28mm~300mm)
Standard Accessory Flower-shaped hood
Compatible Mounts Canon and Nikon (with Built-In Motor)
*values given are for Nikon AF-D cameras; the cosmetic design and specs are subject to change without notice. Company Information: Name: Tamron USA Inc. Address: 10 Austin Boulevard City: Commack State: NY ZIP: 11725 Country: USA Phone: 631 858 8400 FAX: 631 694 1414 http://www.tamron.com
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