Canon are the market kings when it comes to DSLR and still photography lenses and the 16-35mm lens is a staple of the docu film-maker/photographers collection. The Canon 16-35mm F2.8 ii USM is from their L Series professional lens range, representing the best in precision-designed EF optics. L-series lenses combine superior performance with great handling, and are resistant to dust and moisture. With a fast F2.8 maximum aperture, which stays constant over the full focal-length range, you know that you will be getting fast and sharp images without having to lose quality when zooming in and it gives you that all important control over depth of field. The lens is both manual and autofocus, with a ring-type ultrasonic motor driving the autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting.The Canon 16-35mm F2.8 incorporates three aspherical elements to make sure of that corner-to-corner sharpness and total clarity throughout the focal range. Two UD (Ultra Low Dispersion) elements get rid of those chromatic aberrations and super spectra coatings give accurate colour balance and enhances contrast. They also reduce flare and ghosting – a common problem caused by light bouncing off a camera’s sensor.