The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 400mm F2.8L and the Canon 400mm F4 DO IS II 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 RF 400mm F2.8L is the longer of the two lenses at 367mm. The Canon 400mm F4 DO IS II USM with a length of 233mm, is 134mm shorter. Besides being longer, the Canon RF 400mm F2.8L also has a larger diameter of 163mm compared to the Canon 400mm F4 DO IS II USM's 128mm diameter.
Below you can find a scaled side-by-side image of Canon RF 400mm F2.8L and Canon 400mm F4 DO IS II USM to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 400mm F2.8L and the Canon 400mm F4 DO IS II 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 400mm F4 DO IS II USM weighs 2100g, 27% (790g) lighter than the Canon RF 400mm F2.8L's weight of 2890g.
Filter Threads
Both the Canon RF 400mm F2.8L and the Canon 400mm F4 DO IS II USM have the same Filter thread size of 52mm .
Below are links to the 52mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 400mm F2.8L has the Canon RF lens mount whereas the Canon 400mm F4 DO IS II 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
Both lenses have the same focal range of
400mm but while Canon RF 400mm F2.8L has the fastest aperture of
F2.8 , the Canon 400mm F4 DO IS II USM's widest aperture value is
F4.0 .
