Canon 200-400mm f/4L IS with 1.4x extender

Canon's EF 200-400mm f/4L IS lens, shown here in prototype form at the Photokina show, includes a built-in 1.4x focal-length extender.
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Photo by: Stephen Shankland/CNET / Caption by:

Canon 200-400mm's 1.4x extender

A close-up showing the housing for the 1.4x focal-length extender. The switch can be locked to keep the lens in one position or another.
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Photo by: Stephen Shankland/CNET / Caption by:

Canon 200-400mm f/4L IS settings panel

The 200-400mm prototype includes a number of manual controls. Image stabilization can be turned on and off, a focus preset can be set in advance to ease autofocusing, a newer power focus (PF) mode is available for smooth motor-driven focus changes while shooting video, and range can be limited from 2m to 6m or from 6m to infinity.
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Photo by: Stephen Shankland/CNET / Caption by:

Canon supertelephoto lens lineup at Photokina

The wide-aperture supertelephoto lineup from Canon includes a 400mm f2.8 lens, the forthcoming 200-400mm f4 lens, the 500mm f4 lens, the 600mm f4 lens, and the 800mm f5.6 lens.
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Canon 200-400mm's 1.4x extender bulge

The 200-400mm lens has a noticeable bulge where the 1.4x extender resides when not engaged.
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Photo by: Stephen Shankland/CNET / Caption by:

Canon 200-400mm f/4L IS with 1.4x extender

Canon's 200-400m f/4L IS lens has a large objective lens -- but not as large as the brighter 400mm f/2.8 lens Canon also sells.
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Photo by: Stephen Shankland/CNET / Caption by:

Canon 200-400mm f/4L IS with 1.4x extender

The lens has a distance gauge built in. The knob is for adjusting the tripod-mount ring so the camera can be rotated from portrait to landscape orientation.
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Photo by: Stephen Shankland/CNET / Caption by:
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