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<p>The Canon EF 400mm f/4 DO IS II USM lens delivers brilliant high-speed performance for professionals with minimal glare and superb image quality. Taking advantage of the best in lens technology, it features gapless dual-layer diffractive optical elements for improved diffraction efficiency with reduced flare. These elements are arranged with a large-diameter ground aspheric lens and a UD lens for a new level of sharpness and clarity. New coatings help to reduce ghosting, ensure excellent color balance and reduce fingerprints on the front and rear of the lens.</p>
<p>Professional L-series dust- and water-resistant construction is complemented by impressive performance: a 3 mode Image Stabilization system offers up to four stops of compensation and can even prevent operational errors when the camera is mounted on a tripod. AF stop buttons placed on the front of the lens can automatically stop focusing at any time; full time manual focus ensures complete control no matter the AF mode, and a Power Focus (PF) mode makes for smooth focus transitions when shooting movies. The EF 400mm f/4 DO IS II USM focuses down to 10.8 ft. (3.3 meters), has a 9-blade aperture for pleasing, soft, out-of-focus areas, and is constructed with environmentally friendly lead-free
glass.</p>
<p><strong>Canon EF 400mm f/4 DO IS II Specifications</strong></p>
<ul>
<li>Compact, lightweight super telephoto lens that is ideal for sports and wildlife photography.</li>
<li>Newly-developed gapless dual-layer diffractive optical elements deliver improved image quality with reduced flare.</li>
<li>Large diameter ground aspherical lens and UD lens for even greater optical performance.</li>
<li>Optical Image Stabilizer provides up to four shutter speed stops of correction*.</li>
<li>Three image stabilization modes (standard, panning, and during exposure only) provide exceptional results for a wide range of shooting situations.</li>
<li>For greater convenience, Image Stabilizer does not have to be disabled when shooting with a tripod.</li>
<li>AF stop buttons on the front of the lens allow you to stop autofocusing at any point.</li>
<li>Optimized lens placement and coatings deliver exceptional color balance, while minimizing ghosting and flare.</li>
<li>Highly resistant to dust and water, enabling shooting even in harsh conditions.</li>
<li>Circular aperture (9 blades) delivers beautiful, soft backgrounds.</li>
<li>Full-time manual focus allows manual focus adjustment while in AF Mode.</li>
<li>Power Focus mode enables smooth focus shifts essential for filmmaking.</li>
<li>Fluorine coating on front and rear lens surfaces reduces smears and fingerprints.</li>
<li>Minimum focusing distance of 10.8 ft./3.3 m.</li>
</ul>
<div id="attachment_17316" style="width: 459px" class="wp-caption aligncenter"><a href="http://www.canonrumors.com/wp-content/uploads/2014/09/canon400doiiMTF.jpg"><img class="size-full wp-image-17316" src="http://www.canonrumors.com/wp-content/uploads/2014/09/canon400doiiMTF.jpg" alt="Canon EF 400mm f/4 DO IS II MTF Charts" width="449" height="462" /></a><p class="wp-caption-text">Canon EF 400mm f/4 DO IS II MTF Charts</p></div>
<p><strong>Preorder the Canon EF 400mm f/4 DO IS II $6899: <a href="http://www.bhphotovideo.com/c/product/1081814-REG/canon_8404b002_ef_400mm_f_4_do.html/bi/2466/kbid/3296" target="_blank">B&H Photo</a> | <a href="http://www.adorama.com/CA40042U.html?KBID=64393" target="_blank">Adorama</a> | Amazon</strong></p>
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