This Tamron superzoom spans an astonishing range of focal lengths from a truly wide 16mm through to 300mm telephoto (35mm film equivalent: 24.8-465mm). At wide-angle it covers sweeping panoramic landscapes and intimate interiors; as a telephoto it can capture powerful close-ups of distant subjects. This unprecedented flexibility in framing is available with a quick turn of the zoom ring.
Leading-edge optics with ultrasonic focus and image stabilisation – plus 1:2.9 macro
The lens combines our latest advances in optical design – including the deployment of aspherical elements and newly developed glass – with multiple layers of coating to produce clear, sharp images while maintaining compact dimensions. And like all new Tamron lenses, ultrasonic focus and Vibration Compensation provide fast, quiet AF response and sharp images in lower light. Macro focusing down to 1:2.9 is also provided.
Improvements upon the 18-270mm F/3.5-6.3 Di II VC PZD (Model B008) include:
- Greater focal length range – another 32mm
- Over 10% field of view at 16mm zoom
- Enhanced support for contrast-detection AF capabilities
- Smoother focusing in live-view mode
- Full-time manual focus
- Greater maximum magnification ratio of 1:2.9
High image quality in a compact, lightweight zoom
This cutting-edge design employs Tamron's advanced optical and mechanical design technology. There are 16 elements in 12 groups including three Moulded-Glass Aspherical elements, two LD (Low Dispersion) elements and UXR (Ultra-eXtra Refractive Index) glass. Together, they correct optical aberrations, while state-of-the-art multilayer coating significantly minimises ghosting and flare to deliver images of exceptional clarity. The entire package is kept incredibly compact through the use of advanced mechanical design engineering.
Far superior image quality – while reducing lens size and weight
Tamron uses several hybrid aspherical lens elements in its lenses bearing the Aspherical designation. The benefits are two-fold: first, their non-spherical shapes virtually eliminate spherical aberration and image distortion. Second, as one hybrid aspherical lens element can take the place of multiple elements without compromising performance, they allow the lens to be much more compact.
As a result, these innovative optics have played a crucial role in delivering uniformly high image quality across all apertures and focal lengths of extraordinarily compact ultra-zoom lenses.
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
Extra Refractive Index
More compact lenses with superior image quality
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. With its superior light-bending power, XR glass makes it possible to design a short-barrel lens with the same light-gathering ability (aperture value) as a long-barrel lens – even with a smaller lens diameter. By using this principle Tamron has been able to shorten the length of the entire optical system and produce lighter, more compact lenses of the same speed, and also to provide greater zoom ranges in lenses that are much more convenient to carry and hand-hold.
XR glass is costlier than conventional glass but it yields enhanced optical power distribution, making the innovative XR lens designs possible.
Ultra Extra Refractive Index
XR glass enhanced
UXR glass is a development of XR glass, bending light even further. Like XR glass, UXR plays an important role in minimising the size and weight of the lens, optimising handling and dexterity.