AF28-300mm F/3.5-6.3 XR Di LD Aspherical [IF]
Model A061

Tamron is the leader in developing high-ratio zoom lenses for everyday use, releasing the first-generation 28-200mm zoom in 1992. More recently Tamron extended the telephoto range to 300mm in the AF28-300mm Ultra Zoom XR F/3.5-6.3 LD AD Aspherical [IF] Macro. Its Di equivalent now combines the features long desired by photography enthusiasts and newcomers to SLR photography:

• compact size and light weight
• extended focal length range
• smaller filter size
• outstanding optical performance
• improved mechanical construction.

SPECIAL FEATURES

One of the world's most compact, lightweight lenses in its class
This lens provides superior convenience in handling in a highly compact design. The front filter fitting is only 62mm, the maximum diameter just 73mm, the length 83.7mm, and the weight a remarkable 420 grams.

XR technology
Despite the remarkable reduction in size, Tamron 28-300 XR Di provides outstanding optical quality through an improved optical system employing XR (Extra Refractive Index) glass and complex aspherical elements.

Real close-up capability
Amazing macro capabilities are available with a minimum focusing distance of a mere 49cm over the entire zoom range, and a maximum magnification ratio of 1:2.9 at 300mm. This allows the photographer to fill the frame with objects of 10.5 x 7cm in size, or about the size of a music cassette.

Improved zoom torque
Through the incorporation of new mechanical designs such as a Moving Triple Cam, the lens zooms smoothly and consistently from wide angle to telephoto.

Nine-blade diaphragm
The 9-blade diaphragm design provides a soft blurred background that is very pleasing in portraiture and macro photography, isolating the subject from a distracting background and providing a professional-looking image. This blurred effect is enhanced at high magnification and/or open aperture settings, for softer, more natural images.

Zoom lock mechanism
The Zoom Lock prevents unwanted barrel extension when carrying the lens/camera combination. The user simple retracts the lens to the 28mm position and locks the barrel in place. This eliminates the danger of accidentally knocking the lens while walking around.

Flower-shaped lens hood
A glare-reducing flower-shaped lens hood is included as a standard accessory. Tamron was the first manufacturer to use the specially cut hood to provide optimum shading from superfluous light rays entering the rectangular frame from outside the picture angle. From 28mm wide angle to 300mm telephoto, the flower-shaped lens hood allows for sharp and clear image quality free from glare.

High image quality by virtue of "Di" (Digitally integrated) design
The "Di" design is achieved by applying a new optical design to its coated surfaces, in order to reduce the ghosting and flare caused by aberrations, and by further enhancing our already stringent quality control system. The new AF28-300mm Di is reborn as a high power zoom lens now ideal for use with interchangeable-lens digital cameras as well as film cameras.

Convenience and compactness
The amazing changes in angles of view from a 10.7X zoom lens open up completely new horizons, especially when combined with the fundamental attraction of digital SLR cameras: the ability to confirm on the spot the quality or composition of captured images. The new AF28-300mm Di offers the same compactness as that of the previous model designed primarily for film cameras.

Ideal for both digital and film SLRs
The new AF28-300mm Di can be used with both digital SLR cameras and conventional 35mm AF-SLR film cameras. It provides an impressive angle of view equivalent of 42-450mm ultra telephoto when used with a Nikon digital camera, and provides a 28mm wideangle on a 35mm film SLR.

SPECIFICATIONS

NOMENCLATURE

Digitally Integrated Design

Di is a Tamron designation that applies to lenses that have been optimised for digital capture using advanced multi-coating techniques and optical designs that assure excellent image quality across the entire picture field. Because of these characteristics, Di lenses provide outstanding performance on cameras with full-frame and APS-C format sensors as well as on 35mm film.

Extra Refractive Index

XR (Extra Refractive Index) glass can bend light rays at steeper angles, thereby decreasing the physical length of the lens while enhancing imaging performance by minimising optical aberrations. This has allowed Tamron to develop a line of shorter, smaller-diameter, lighter lenses without sacrificing lens speed, actually upgrading image quality compared to older designs.

XR glass is costlier than conventional glass but it yields enhanced optical power distribution, making possible many of the outstanding and innovative lens designs that bear the XR designation.

Low Dispersion

Chromatic aberration occurs when a lens element refracts different wavelengths of a ray of light – its rainbow colours – at very slightly different angles. This results in the 'colour fringing' that reduces the sharpness of an image. LD elements are made from special glass materials with extremely low dispersion indices (i.e. the refraction of a ray of light into rainbow colours is extremely narrow). Thus they effectively compensate for chromatic aberration at the centre of the field (on axis), a particular problem at long focal lengths (the telephoto end of the zoom range), and for lateral chromatic aberration (toward the edges of the field) that often occurs at short (wideangle) focal lengths. Although costly, LD glass materials result in clear, vivid image quality.

Aspherical

Tamron uses several hybrid aspherical lens elements in its lenses bearing the Aspherical designation. These innovative optics achieve the ultimate in image quality while producing lenses that offer remarkable zoom ranges in extraordinarily compact packages. These cutting-edge advances have advanced the state of optical design by virtually eliminating spherical aberration and image distortion from Tamron's high-power-zoom series.

As one hybrid aspherical lens element can take the place of multiple elements without compromising performance, remarkably compact long-range lenses can now deliver a uniformly high level of image quality across all focal lengths and apertures.

Internal Focusing

Tamron's internal focusing (IF) mechanism provides numerous practical benefits to photographers including:

• a non-rotating front filter ring that facilitates the positioning of polarising and graduated filters
• more predictable handling because the lens length does not change during focusing
• a much closer minimum focusing distance (MFD) throughout the zoom range
• improved optical performance by minimising loss of illumination at the corners of the image field (vignetting)
• suppression of other aberrations that become more troublesome at different focusing positions.

Specifications, design, product name and standard accessories may differ by country or area. While every effort has been made to ensure accuracy, these matters are subject to change by the manufacturer without notice or obligation.

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