Spanning a unique wide-angle to medium telephoto range, the Canon EF-mount 35-150mm f/2.8-4 Di VC OSD from Tamron is a flexible zoom characterized by its bright f/2.8-4 maximum aperture range & relatively compact, lightweight design for general use. The optical design employs both low dispersion glass & aspherical elements, which help to reduce chromatic & spherical aberrations throughout the zoom range for enhanced clarity & sharpness. Complementing the optics, an Optimized Silent Drive AF motor realizes near-silent, fast focusing performance while a Vibration Compensation system minimizes the appearance of camera shake for sharper handheld shooting.