CN-E20-50mm T2.4 L F (EF/PL)

The new FLEX ZOOM LENS Series offers the brightness of the T2.4 maximum aperture throughout the zoom range to enable impressive shooting with a shallow depth of field.

Available in EF or PL mount.

  • Focal length of 20-50mm (zoom ratio 2.5x)
  • T2.4 large aperture and 11-blade diaphragm for beautiful bokeh
  • Full-frame image circle with spectacular 8K image quality

Outstanding optical performance 

Adopting a design that combines large-aperture aspherical lenses and anomalous dispersion glasses, CN-E20-50mm T2.4 L F can deliver high quality 8K camera optical performance throughout the focal length. In addition, the CN-E20-50mm T2.4 L F provides outstanding image quality from the centre to the periphery of the frame by correcting the various aberrations present. 

High Dynamic Range capabilities

HDR video offers an expanded tonal range representing the visual expression close to its natural image. However, it also eliminates white and black clipping, making colour bleeding, ghosting, and flaring more noticeable.

CN-E20-50mm T2.4 L F's 8K-compatible chromatic aberration correction reduces colour bleeding. The light-shielding design and optimised coating inside the lens barrel minimises ghosting and flare. 

Gear pitch standardised

The pitch of the three iris, zoom, and focus gears have been standardised at 0.8mm.

In addition, standard cinema-style accessories for video production can be attached for even more customisation.

Adjustable flange back

The flange back can be adjusted when changing lenses. The adjustment mechanism has a cap that prevents unintentional shifting of the flange back.

Adjustments can be made using a flat-head screwdriver.

Improve visibility

The focus, zoom, and iris indicators are engraved into the tilted surface of each control ring, ensuring visibility from both the camera side and rear.

Focus scale rings are available with either "ft" or "m" displays.

EOS-EF lens communication support

Data can are transmitted via the EOS System EF mount between the camera and the lens.

The camera will identify the lens metadata, record it and display it. In addition, chromatic aberration and peripheral light can be corrected based on the information from the lens when paired with compatible cameras.

Cooke /i Technology communication support

The lens supports the widely used Cooke's /i Technology communications protocol* and ZEISS's eXtended Data communication protocol*.

When connected to a camera that supports this protocol via the PL mount, information from the lens can be recorded and displayed.

*Compatibility may vary depending on your device and its specifications

Mount replacement service

The mount on the lens can be changed to either EF mount or PL mount, allowing you the flexibility in using the lens with your cameras. In addition, the changeable mount assures your investment in this lens for the long run.

Note: A mount replacement kit is required (sold separately). Mount replacement service is provided by Canon Service Centre or by selected authorised rental providers.


Introducing the Flex Zoom Series CN-E20-50mm T2.4L F / FP demonstration video and the behind the scene video.