The Tamron SP 70-200mm f/2.8 Di VC USD Zoom Lens for Canon is a
high-speed standard to telephoto zoom lens with a fast f/2.8 maximum
aperture throughout the zoom range. Designed for full-size SLR and DSLR
cameras, it offers superior image quality accentuated by advanced
Vibration Compensation (image stabilization) and an Ultrasonic Silent
Drive Motor for quiet, smooth and precise autofocus.
optical design for this popular focal length zoom delivers high contrast
and high resolution throughout the zoom range and one Extra-low
Dispersion element with four Low Dispersion elements minimize chromatic
aberrations. A circular diaphragm that retains its round shape even when
taken down two stops from f/2.8 offers expressive background blurring.
A compact build with large focus and zoom rings and a moisture
resistant construction, this lens comes with a removable tripod collar
and a petal-type lens hood.