A USD (Ultrasonic Silent Drive) autofocus motor provides quick and precise focusing performance, with high torque, low response times, and quiet operation to benefit both still and video applications. Additionally, a full-time manual focus mechanism enables manual fine-tuning of focus at any point, even when the AF system is engaged.

Image Quality

Comprised of 18 elements in 13 groups, including an XGM (eXpanded Glass Molded Aspherical) element placed at the front group and several LD (Low Dispersion) glass elements in the system, aberrations such as geometrical distortion and lateral color are efficiently compensated for, enabling the zoom lens to deliver quality imagery throughout the entire range from corner to corner.

BBAR and eBAND Coatings

BBAR (Broad-Band Anti-Reflection) coating renders uniformity in transmissivity across the critical bandwidths. Coupled with the eBAND coating, ghosting and flare typically observed on ultra wide-angle lenses are efficiently eliminated, resulting in sharper and clearer images.

VC

VC (Vibration Compensation) is Tamron's proprietary image stabilization mechanism which reduces the effects of camera shake to deliver sharp images in low light and at slower shutter speeds. It is a newly developed three coil system that employs a lighter moving coil mechanism which contributes to its improved performance and overall compact design.

Ultrasonic Motor

USD (Ultrasonic Silent Drive) Motor is the power for a fast and quiet autofocus drive that works in harmony with the continuous manual focus mechanism.