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Canon has replaced the widest zoom in its professional lens line with the new EF 16-35mm f/2.8L II USM lens. According to Canon, it improves upon the company's existing 16-35mm L lens with better peripheral image quality and reduced lateral chromatic aberration, using three aspherical lens elements and two Ultra Low Dispersion (UD) elements. The weatherproof lens also features new coatings to minimize ghosting and flare.
The new wide zoom lens focuses internally and has full-time mechanical manual focus, so that manual focus is enabled in AF mode. The front element of the lens does not rotate during focusing and zooming. Photographers who replace their current 16-35mm will need a new set of filters too -- this slightly larger optic has an 82mm filter diameter instead of the 77mm of the older lens.
The 16-35mm f/2.8L II USM lens has an EF mount and is compatible with all EOS SLRs. It will be available in April 2007 at a price that has not yet been announced.
From the Canon EOS 1D Mark III Press Release:
A new EF 16-35mm f/2.8L II USM Lens succeeds the versatile EF16-35mm f/2.8L USM Lens as a high-performance L-series wide-angle zoom lens, specifically designed for improved peripheral image quality. Compatible with all EOS SLRs past and present, it uses three high-precision aspherical lens elements and two Ultra Low Dispersion (UD) lens elements to minimize lateral chromatic aberration and to produce superb image quality with excellent resolution and contrast. New coatings minimize ghosting and flare. It is an internal focus design, so the front element does not rotate during focusing and zooming, a convenience for users of circular polarizer filters. The lens is also fully gasketed and sealed for dust and moisture resistance, and it features an electronic diaphragm with circular blades for natural-looking background blur effects.
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