Tamron Announces AF28-300mm VC Lens Equipped With Built-In AF Motor For Nikon SLR Cameras
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.
Model Name A20
Focal Length 28-300mm
Maximum Aperture F/3.5-6.3
Angle of View 75Â°23′-8Â°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 Ã67mm
Overall Length 3.9" (99mm)
Maximum Diameter Ã3.06" (Ã78.0mm)
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)