Tamron SP 15-30MM F2.8 Di VC USD for Canon

Uncompromising quality

Superb corner-to-corner image quality from an ultra wide-angle zoom

Focal length: 15mm Exposure: f/11 0.6 sec ISO400?€€© Ian Plant

Focal length: 30mm Exposure: f/2.8 1/20 sec ISO100

Tamron aims for the highest standards with the SP (Super Performance) lens series – and the 15-30mm F/2.8 full-frame ultra-wide-angle zoom is a worthy addition.

This high-performance zoom lens equals the performance of fixed focal length lenses from 15mm to 30mm, an unprecedented achievement made possible by the development of its unique XGM (eXpanded Glass Molded Aspherical) lens element that effectively controls aberrations and enhances sharpness. The Tamron 15-30mm is the first zoom* to combine such a wide range of coverage, a fast f/2.8 aperture and image stabilisation.

Superior new coating for wide-angle image quality

Tamron's proprietary eBAND (Extended Bandwidth & Angular-Dependency) Coating suppresses tangential reflections, while a new generation of BBAR (Broad-Band Anti-Reflection) Coating has been optimised for ultra-wide angles of view. Together, they effectively correct ghosting and flare, yielding vivid images of extraordinary clarity.

Vibration Compensation enhances photo opportunities

Responding to the demand for a wide-angle lens suited for handheld shooting at slow shutter speeds, Tamron has created the world's first f/2.8 ultra-wide-angle zoom lens with image stabilisation. The result is a lens able to capture sharp images even when shooting handheld under low light conditions.

Soft-focus backgrounds at wide-angle settings

The large f/2.8 aperture lets you soften the foreground or background to dramatically emphasise the subject. A minimum focusing distance of 0.28m over its entire range of focal lengths allows wide-macro effects.

Fluorine coated front element

As the large, convex front element cannot be protected by a filter, it has been given a fluorine coating that repels water and dirt, and makes it much easier to remove smudges as well.

Resistant to the elements

Moisture-resistant construction helps prevent moisture from penetrating the lens.

Ultrasonic Silent Drive for precise, quiet autofocus

The quiet high-torque USD motor ensures autofocusing with precision.

Optical design

	eXpanded Glass Molded Aspherical
	Molded Glass Aspherical
	LD element

XGM eXpanded Glass Molded Aspherical

Corrects aberrations typical to wide-angle lenses

A large diameter XGM (eXpanded Glass Molded Aspherical) lens element is featured in the first lens group of a system that also includes several LD (Low Dispersion) elements in its 18-element, 13-group optical design. This combination effectively controls distortion and chromatic aberrations that typically affect wide-angle lenses.

Compared to a previous Molded-Glass Aspherical element (left), XGM has a larger aspherical surface.

Aspherical

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.

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.

Rounded diaphragm

Attention-grabbing blur effects at wider apertures

Use depth of field more creatively with spectacular but natural-looking background blur.

The rounded outline diaphragm of the lens is retained even when stopped down to f/5.6. Blur highlights in a photo reflect the shape of the aperture, and they are a much more prominent feature at wider apertures. Especially in higher-speed lens, this important optical design element results in more attractive, natural-looking images.

eBAND Coating

Advanced lens coating produces even sharper, crisper images

This new coating technique developed by Tamron deploys a nano-structured* layer with dimensions smaller than the wavelengths of visible rays of light. Called eBAND (extended Bandwidth & ANgular-Dependency), its ultra-low refractive index, combined with the sophisticated multiple-layer coatings underneath, yields significant anti-reflection properties, absolutely minimising flare and ghosting to deliver sharp, crisp images.

*1nm = 1/1,000,000mm

Broad-Band Anti-Reflective coating

Cleaner, crisper images without flare or ghosting

For the precision required by digital sensors, Tamron's BBAR (Broad-Band Anti Reflection) multilayer coatings reduce reflection into the lens elements, enhancing light transmission on both long and short wavelengths. Internal surface coatings are also applied on cemented surfaces of lens elements to make images sharper with better colour balance and reproduction.