Canon EF 100mm f/2.8 Macro USM Lens

EF Mount LensAperture Range: f/2.8:32Macro Focus at 1:1 Reproduction RatioThree:Group Floating Lens SystemUltrasonic Autofocus MotorInner Focusing SystemFocusing Range LimiterManual Focus OverrideMinimum Focus Distance: 1'Optional Detachable Tripod Collar EF Mount Lens|Aperture Range: f/2.8:32|Macro Focus at 1:1 Reproduction Ratio|Three:Group Floating Lens System|Ultrasonic Autofocus Motor|Inner Focusing System|Focusing Range Limiter|Manual Focus Override|Minimum Focus Distance: 1'|Optional Detachable Tripod Collar