Tamron SP lenses for professional photographers, which, apart from providing good quality shoot, shoot more in line with new models feature a new generation of high-resolution digital single-lens reflex machines, to provide more comprehensive details of the reduction effect of the image. SP 15-30mm F2.8 Di VC USD ultra-wide-angle zoom lens is fully compatible with full-frame digital SLR machine (and can be used in APS-C format digital SLR machine). High quality performance even comparable 15mm lens to 30mm fixed focus lens, mainly because of the lens for the first time with a new design XGM (eXpanded Glass Molded Ashperical) large glass molded aspherical lens, effectively correct screen variant, the dispersion while improving overall quality, including contrast and sharpness. In addition, the new design of SP 15-30mm F2.8 Di VC USD more the focal length extends to 30mm, compared with the same type of 24mm or 28mm lens models more practical. ? SP 15-30mm F2.8 Di VC USD for the first time ultra-wide angle zoom lens with VC image stabilization system, making ultra-wide-angle shooting shutter control more flexible, full product design Tamron‘s intentions.