Tamron Announces AF28-300mm VC Lens Equipped With Built-In AF Motor For Nikon SLR Cameras
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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.
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.
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 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 Ø67mm
Overall Length 3.9” (99mm)
Maximum Diameter Ø3.06” (Ø78.0mm)
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)
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