The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 10-20mm F4 L IS STM and the Canon EF 11-24mm F4L USM for their suitability to various photography scenarios:
Size and Weight Comparison The size of a lens is a crucial factor to consider when comparing two lenses. Canon EF 11-24mm F4L USM is the longer of the two lenses at 132mm. The Canon RF 10-20mm F4 L IS STM with a length of 112mm, is 20mm shorter. Besides being longer, the Canon EF 11-24mm F4L USM also has a larger diameter of 108mm compared to the Canon RF 10-20mm F4 L IS STM's 84mm diameter.
Below you can find a scaled side-by-side image of Canon RF 10-20mm F4 L IS STM and Canon EF 11-24mm F4L USM to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 10-20mm F4 L IS STM and the Canon EF 11-24mm F4L USM Size and Weight The weight of a lens is equally significant as its external dimensions, particularly if you intend to handhold your camera and lens combination for extended periods. Canon RF 10-20mm F4 L IS STM weighs 570g, which means it is 595g (51%) lighter than the Canon EF 11-24mm F4L USM which has a weight of 1165g.
Lens Mounts
The Canon RF 10-20mm F4 L IS STM has the Canon RF lens mount whereas the Canon EF 11-24mm F4L USM has the Canon EF lens mount . Some of the latest released cameras that are compatible with these mounts are Canon R6 V , Canon R6 III and Canon C50 for the Canon RF Mount and Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Focal Range
Canon RF 10-20mm F4 L IS STM has a focal range of 10-20mm and
2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
15 - 30mm .
On the other hand, the Canon EF 11-24mm F4L USM has a focal range of 11-24mm and 2.2X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 17.6 - 38.4mm .
