Tamron AFF013C-700SP 45mm F/1.8 Di VC USD (model F013) For Canon Fast f/1.8 aperture Dynamic close focusing capability. Focus Type-Auto.The SP 45mm (MOD: 0.29m) offers best-in-class close focusing. VC (Vibration Compensation) system. Maximum magnification ratio - 1:3.4 Fluorine coating on front element to repel water and fingerprints High speed AF with USD (ultrasonic drive)