Tamron 70-300mm F/4-5.6 Di VC USD SP for Nikon
Dynamic Shots Require Dynamic Lenses.
Fast becoming a benchmark for this category, the SP 70-300mm F/4-5.6 Di VC is an ideal choice for a two-zoom system—complimenting a wide-to-moderate-tele zoom perfectly. Delivering class-leading sharpness, brilliant color and striking contrast, discriminative APS-C and full-frame digital SLR photographers alike are quick to laud its performance. The first lens to feature Tamron’s USD (Ultrasonic Silent Drive) auto-focus drive mechanism and VC (Vibration Compensation)* image stabilization, these proprietary technologies are teamed with XLD (Extra Low Dispersion) and LD (Low Dispersion) glass in a 17 element, 12 group formula. APS-C-sensor photographers will enjoy extreme telephoto subject magnification, with a resulting picture angle range approximating a 109-465mm lens on a 35mm film or full-frame DSLR. Sharpness, enhanced by Tamron’s exclusive tri-axial VC image stabilization is amazing. Combating blur from camera shake, Tamron VC enables shooting handheld at as many as four shutter speeds slower than would be possible otherwise. Full-time manual focus makes fine tuning easy.
VC (Vibration Compensation) – The VC Image Stabilizer delivers sharp and shake-free images, as well as a smooth viewfinder image.
Super Performance – Tamron’s Super Performance series delivers a range of lenses that meet the highest standards.
USD (Ultrasonic Silent Drive) – Tamron’s USD works with the high-frequency ultrasonic vibrations that are produced by a ring called a ‘stator’. Energy from the vibrations is used to rotate an attached metallic ring known as the ‘rotor’. Piezoelectric ceramic, an element that produces ultrasonic vibrations when voltage of a specific frequency is applied is arranged in a ring formation on the stator. This electrode configuration of piezoelectric ceramic causes two ultrasonic vibrations to occur in the stator.
By effectively combining these two ultrasonic vibrations, it is possible to convert the energy from the vibrations that produced simple motion into energy known as ‘deflective traveling waves’, which then moves around the circumference (rotation direction) of the ring.
With the USD, the friction between these deflective traveling waves created on the metallic surface of the stator and the surface of the rotor produce force, causing the rotor to rotate. The focusing ring lens, which is linked to the rotor, is thus moved, creating a fast and smooth auto-focus drive.
LD (Low Dispersion) – Lens element for greater image sharpness and the correction of chromatic aberration.
Internal Focusing (IF) System – The extension length of the lens does not change during focussing and the close focussing distance is significantly reduced across the entire focusing range.
XLD (Extra Low Dispersion) Glass –A special glass with an extremely low colour dispersion index for the greatest level of sharpness and compensation of chromatic aberration.