EF 24mm f/1.4L II USM.
• Ultrasonic lens is a venerable, indispensable tool amongst news photographers and photojournalists demanding a fast, reliable and high-quality wide-angle lens.
• Constructed completely from lead-free glass, it's the first EF lens to include Replicated Aspherical and Ultra-low dispersion lens elements.
• The former works to suppress image distortion and spherical aberrations, while the latter dramatically reduces lateral chromatic aberrations which are often observed with wideangle lenses.
• The result is a remarkably high-resolution, distortion-free image over the entire focusing image of the lens.