Blending a favoured wide-angle focal length with a bright maximum aperture, the EF 24mm f/1.4L II USM is a Canon L-series lens characterized by a robust physical construction and sophisticated optical design. Two ultra-low dispersion elements help to control chromatic aberrations and colour fringing while a pair of aspherical elements reduce spherical aberrations and distortion for high sharpness and clarity. Individual elements also feature a Sub Wavelength Coating to suppress lens flare and ghosting for improved contrast and colour neutrality in a variety of lighting conditions. Besides the optical attributes, this lens is also distinguished by its fast f/1.4 maximum aperture to benefit working in low-light conditions for controlling depth of field. Additionally, this lens sports a ring-type USM for quick and quiet autofocus performance and full-time manual focus override, and an internal floating focus mechanism also helps to maintain consistent image quality throughout the entire focusing range.
Aspherical and UD elements For optimum visual performance, the lens incorporates two types of special elements: aspherical elements to correct spherical aberrations, and Super UD (ultra-low dispersion) elements to eliminate secondary chromatic aberrations. The result is crisp, high contrast and undistorted image quality all the way across the frame.
Subwavelength structure lens coating Canon’s patented lens element coating minimises the ghosting and flare caused by internal reflections within a lens and helps the EF 24mm f/1.4L II USM to deliver crisp, clear images.
Ultrasonic focusing A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.
L-series quality The L-series is Canon's flagship professional lens range, representing the best in precision-designed EF optics. L-series lenses combine superior performance with superlative handling, and are resistant to dust and moisture.
Lead-free optics Environmentally friendly, lead-free glass is used throughout the construction of the EF 24mm f/1.4L II USM.