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  • E.F. (Eelectronic Focus) - built-in electronic focusing system, these letters also designate lenses for use on full-format Canon EOS cameras
  • L (Luxury) - premium lens
  • FTM (Full Time Manual Focusing) - constant manual focusing
  • USM (UltraSonic Motor) - ultrasonic motor
  • Aspherical- aspherical elements in the optical design
  • Super UD (Super Ultra Low Dispersion) - the presence in the optical design of elements with ultra-low dispersion
  • IS (Image Stabilizer) - image stabilizer
  • IF (Internal Focusing) - internal focusing

Canon EF 24-105mm f/4L IS USM

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