A 24mm prime lens with a fast f28 maximum aperture that is perfect for landscape travel and documentary photography image stabilisation helps in low light and usm af focuses quickly and quietly 24mm wide angle lens 38mm equivalent on aps c sized sensors fast f28 maximum aperture up to four stop image stabilizer ultrasonic autofocus mechanism 02m close focusing distance circular aperture for soft background blur super spectra coatings reduce flare porta