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.


Features:

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 f/2.8, 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.


Specifications:

Focal Length & Maximum Aperture: 100mm 1:2.8

Lens Construction: 12 elements in 8 groups

Diagonal Angle of View: 24¦

Focus Adjustment: Inner focusing system with USM.

Closest Focusing Distance: 0.31m / 1 ft. (film plane to subject).

Filter Size: 58mm

Max. Diameter x Length, Weight: 3.1" x 4.7", 21.1 oz. / 79.0 x 119.0mm, 600g


Mfr.# 4657A006