The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100-400mm and the Canon EF 70-300 F4-5.6 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 100-400mm is the longer of the two lenses at 165mm. The Canon EF 70-300 F4-5.6 IS II USM with a length of 146mm, is 19mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 80mm.
Below you can find a scaled side-by-side image of Canon RF 100-400mm and Canon EF 70-300 F4-5.6 IS II USM to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 100-400mm and the Canon EF 70-300 F4-5.6 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 RF 100-400mm weighs 635g, which means it is 75g (10%) lighter than the Canon EF 70-300 F4-5.6 IS II USM which has a weight of 710g.
Filter Threads
Both the Canon RF 100-400mm and the Canon EF 70-300 F4-5.6 IS II USM have the same Filter thread size of 67mm .
Below are links to the 67mm filters that we recommend you to consider for these lenses:
Lens Mounts
The Canon RF 100-400mm has the Canon RF lens mount whereas the Canon EF 70-300 F4-5.6 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
Canon RF 100-400mm has a focal range of 100-400mm and
4.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
160 - 640mm .
On the other hand, the Canon EF 70-300 F4-5.6 IS II USM has a focal range of 70-300mm and 4.3X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 112 - 480mm .
