 AF70-300mm F/4-5.6 Di LD Macro 1:2
Model A17 and A17N II for Nikon*
Tamron's lightweight, compact, high-image-quality telephoto zoom lens with macro capability of 1:2 has improved multi-coating for optimised performance with digital SLR cameras as well as film cameras.
Flipping a macro switch in the focal length range of 180mm to 300mm obtains a maximum magnification ratio of 1:2 at a minimum focus distance as short as 37.4", enabling close-up shots of flowers, insects, and other objects that normally require the use of a specially designed macro lens. Meanwhile, this lens casually offers the distant capture and foreshortening effect pleasures of the 300mm ultra-telephoto world.
*Now available with a built-in motor for Nikon, making it compatible with models such as the D40.
SPECIFICATIONS
| Model nos. |
A17
A17N II for Nikon AF-S |
| Lens construction |
13 elements in 9 groups |
| Angle of view |
34°21'-8°15' |
| Type of zooming |
Rotation |
| Diaphragm blade number |
9 |
| Minimum aperture |
F/32 |
| Minimum focus |
59in.(1.5m) in normal settings/ 37.4" (0.95m) in macro mode (f=180mm-300mm range) |
| Macro mag. ratio |
1:2 (at f=300mm MFD 0.95m) |
| Filter diameter |
ø62 |
| Weight |
435g (15.3oz) |
| Diameter x length |
ø3.0 x 4.6in.
(ø76.6 x 116.5mm) |
| Supplied accessory |
Lens hood |
| Mounts available |
Canon
Sony (Konica Minolta)
Nikon-D
Nikon AF-S (Model A17N II)
Pentax |
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.  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.
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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