Canon EF 100mm f/2.8 Macro USM Fixed Lens for Canon SLR Cameras<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> 100mm macro USM lens with f/2.8 maximum aperture for Canon SLR cameras </span></li><li><span class="a-list-item"> Focal length: 100mm， Closest focusing distance : 1 foot (film plane to subject) </span></li><li><span class="a-list-item"> Secondary diaphragm blocks stray light at f/2.8 for increased contrast， Ultra-sonic monitor provides outstanding autofocusing speed at all distances </span></li><li><span class="a-list-item"> 3-group floating system for exceptional close-up performance; full-time manual focus </span></li><li><span class="a-list-item"> Measures 3.1 inches in diameter and 4.7 inches long; weighs 21.1 ounces; 1-year warranty </span></li><li><span class="a-list-item"> Lens not zoomable </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41UK6g-Vs0L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31hu67CIOcL.jpg" noproxy>