The new SP 15-30mm f2.8 Di VC USD G2 (Model A041) incorporates a revised external design, optical construction, image stabilisation and autofocusing drive. The barrel is weather sealed to guard against the intrusion of dust and moisture, while the exposed surface of the front element has a fluorine coating to help better dispel water and grease, and enable easier cleaning.
On the inside the optical construction comprises 18 elements in 13 groups and includes an ‘XGM’ type element (eXpanded Glass Moulded Aspherical), two additional moulded aspherical elements and three with low-dispersion (LD) characteristics. Collectively, these special elements correct for distortion and lateral chromatic aberrations. Tamron’s newly-developed ‘AX’ (Anti-reflection eXpand) multi-coating is applied via specialised deposition technology and keeps the reflection factor for peripheral areas of the lens elements at the same high level as the centre area. This lens also uses Tamron’s ‘BBAR’ (Broad-Band Anti-Reflection) and ‘eBand’ (Extended Bandwidth & Angular Dependency) multi-coating technologies to optimise the correction for ghosting a flare.
Both the ultrasonic AF drive and ‘VC’ (Vibration Compensation) optical image stabilisation are controlled via a ‘Dual MP’ processor system for increased speed. Tamron says that the upgraded image stabiliser is able to provide correction for camera shake of up to 4.5 stops. The minimum focusing distance is 28 centimetres which gives a maximum magnification ratio of 1:5 at 30mm. The minimum aperture is f22.
Available in both the Nikon F and Canon EF mounts, the new A041 models also features a nine-blade diaphragm for smoother out-of-focus effects, an integrated petal-shape lens hood and compatibility with Tamron’s ‘TAP-in Console’ for firmware upgrading and performance adjustments.
The Nikon mount version will available in Australia at the end of September with the Canon mount model following in mid-October. Both models are priced at $2199. Tamron lenses are distributed locally by Blonde Robot and for more information visit http://www.tamron.com.au