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The Canon EF 100mm f/2.8 USM Macro Autofocus Lens will focus over the full range from infinity down to life size (1:1 reproduction ratio). This lens will impress any serious photographer with its combination of versatility, image quality and superb handling. A high-performance ring type Ultrasonic Motor provides fast and silent AF throughout its focus range, and even more significantly, allows full-time manual focusing permitting the close-up or macro shooter to instantly override the AF whenever necessary.

Advanced optical formula with a three-group floating element system for exceptional close-up performance
Internal focusing means the lens length is constant
Secondary diaphragm to block stray light at f/2.8 & increase contrast when shooting in backlit conditions
Ultrasonic Motor provides outstanding AF speed at all focusing distances
Wide manual focusing ring with smooth action & fulltime manual focus override (even in AF mode)
Tripod collar available optionally      
         
Focal Length 100 mm
Aperture Maximum: f/2.8
Minimum: f/32
Camera Mount Type Canon EF
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Canon (APS-C)
Angle of View 24°
Minimum Focus Distance 1' (30.48 cm)
Magnification 1x
Maximum Reproduction Ratio 1:1
Groups/Elements 8/12
Diaphragm Blades 8
Features
Image Stabilization No
Autofocus Yes
Tripod Collar Optional Removable - rotating
Physical
Filter Thread 58 mm
Dimensions (DxL) Approx. 3.1 x 4.7" (7.87 x 11.94 cm)
Weight 1.28 lb (580 g)