Marketed	July 2024
Original Price	Open price
Lens Construction (group)	11
Lens Construction (element)	14
No. of Diaphragm Blades	11
Minimum Aperture	16
Closest Focusing Distance (m)	0.28
Maximum Magnification (x)	0.18
Filter Diameter (mm)	67
Maximum Diameter x Length (mm)	Approx. 76.5x99.3
Weight (g)	Approx.555

Thanks to its f/1.4 aperture, the lens produces a deep and beautiful bokeh effect which makes it possible to expressively highlight the subject. Shooting can be done without raising sensitivity even in low light such as during nighttime or indoors, thereby achieving clear still images and video with minimal noise. It boasts an optical design consisting of 11 groups of 14 lenses, including 2 aspherical lenses and 2 UD lenses^*1 which have been configured effectively, thereby reducing various aberrations that cause image deterioration and ensuring high image quality across the entire screen.

Superb focusing capabilities are achieved through electronic floating focus control which combines a VCM (Voice Coil Motor) ^*2 suited to the heavy, ultra-wide lens drive with a Nano USM (Ultrasound Motor). This feature, in combination with the EOS R Series’ Dual Pixel CMOS AF, enables high-speed and high-accuracy AF as well as quiet and smooth focus adjustment when shooting video. The lens also boasts an exceptional optical design that thoroughly reduces “focus breathing,” a fluctuation in the angle of view that occurs in conjunction with focus operation during video shoots. As a result, users can capture video in a stable composition with very few unintended changes to the angle of view.

The image quality is equivalent to or greater than that of the “EF35mm F1.4L II USM” (released in October 2015). However, in contrast to the previous model, the weight has been reduced from roughly 760g to roughly 555g, while the overall length has been shortened from approximately 105.5mm to approximately 99.3mm to achieve superb mobility. It is also equipped with an iris ring featuring an adjustable aperture much like a cinema lens without the sensation of clicking, thus making it possible to control bokeh and exposure adjustments more intuitively when shooting video.

*1 A lens that utilizes UD (Ultra-low Dispersion) glass.
*2 An actuator that serves as a medium for magnetic energy (magnetic field) by converting electric energy to kinetic energy. A coil moves back and forth in the magnetic field created by the drive unit magnet, while the focus lens unit with a fixed coil fixed is linearly driven.