Focal length 200mm (310mm in 35mm format) | ISO 200
Overview
This lens is ideal for anyone who wants to capture truly dynamic telephoto images far beyond the capabilities of the standard zoom. In photos of family fun, sport events, scenery, and portraiture, the longer focal length naturally creates a out-of-focus background that emphasises the main subject.
This general-purpose enthusiast telephoto lens is designed exclusively for APS-C digital SLR cameras. The versatile focal length of 200mm - equivalent to 310mm in 35mm format - is ideal for portraits, sports, landscapes, and even closeups that rival macro lenses with a minimum focus distance of 0.95m with a ratio of 1:3.5.
Its optical design is optimised especially for digital image sensors with LD (Low Dispersion) lens elements to compensate for axial and magnification chromatic aberrations. Internal surface coatings (multiple-layer coatings on the lens' cemented surfaces) prevent ghosting and flare as well as enhancing peripheral illumination.
This lightweight, compact lens gives even a beginner the means to easily capture beautiful and engaging photos.
Technology
 Low Dispersion
Sharpens edges by reducing 'colour fringing'
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.
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Specifications
| Model no. |
A15 |
| Lens construction |
13 elements in 9 groups |
| Angle of view |
28°28'–7°59' (APS-C size) |
| Diaphragm blades |
9 |
| Minimum aperture |
f/32 |
| Minimum focus |
0.95m (37.4") over entire zoom range |
| Macro magnification ratio |
1:3.5 (at f=200, MFD 0.95m) |
| Filter diameter |
ø52 |
| Weight* |
300g (10.4oz) |
| Diameter x length* |
ø71.6 x 83.0 mm (ø2.8 x 3.3 in.) |
| Supplied accessory |
Lens hood |
| Mounts available |
Canon AF, Sony (Konica Minolta), Nikon AF-D |
*Values given are for Nikon-mount model.
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Optical profile
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Compatibility
 Digitally Integrated for DSLRs with small sensors
Di II lenses are designed for exclusive use on digital SLR cameras with APS-C-format image sensors. This kind of sensor has dimensions smaller than that of a frame of 35mm film, so the circle of light transmitted by the lens to the sensor can be smaller. This means that the lens too can be more compact in size and often lighter in weight.
All Tamron Di II lenses are specially optimised to meet the performance characteristics of DSLRs, providing maximal resolution concentrated within the image field and assuring that light rays at the edges of the frame reach the sensor at favourable angles, thereby minimising peripheral light falloff.
As well, Di II lenses incorporate measures to increase light transmission and eliminate the ghosting and flare that are particularly noticeable with digital cameras. Tamron’s advanced multi-coatings are applied not only to external and internal lens surfaces, but also to surfaces in between cemented lens elements.
Tamron's Di-II range
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Mounts available for this lens
Nikon | Canon | Sony
New classifications for Nikon mounts
Tamron's Nikon-mount lenses featuring an internal AF have until now been designated 'N II'. Lenses using a coupler system* without an internal AF motor were designated as 'N'. As future lens introductions for Nikon will have the internal AF motor as a standard feature, Tamron has simplfiied the designation of all Nikon-mount lenses as 'N', eliminating the 'N II' designation for future models. This change was effective from the 18-270mm F/3.5-6.3 Di II VC PZD (Model B008).
The 'N'-classified lenses with coupler systems are:
* Coupler systems use a shaft which connects with the AF motor built into the camera body to operate the lens. |
More info
Tamron Lens Catalogue 2011 |
AF55-200mm F/4-5.6
for digital SLRs with small sensors
