Autofocus
lens for macro photography up to life-size (1x) magnification.
Inner focusing affords a long working distance of 5.9in. (149mm)
at 1x. A 3-group floating system results in excellent delineation
at all focusing distances. Ring USM for silent and high-speed
AF, and full-time manual focusing also provided.
- Entirely
new optically, with a three-group floating system for exceptional
close-up performance.
- The first
lens in its class to feature innner focusing. The lens length
never changes, even at life size!
- A secondary
diaphragm blocks stray light at f2.8, increasing contrast when
shooting wide-open.
- Ultrasonic
Motor provides outstanding AF speed at all focusing distances.
- Wide manual
focusing ring with smooth action, and full-time manual focus
even in AF mode.
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