The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 24-105mm F4L IS and the Canon 100mm f2.8L Macro IS 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 100mm f2.8L Macro IS USM is the longer of the two lenses at 123mm. The Canon RF 24-105mm F4L IS with a length of 107mm, is 16mm shorter. On the other hand, the Canon RF 24-105mm F4L IS has a larger diameter of 84mm compared to the Canon 100mm f2.8L Macro IS USM's 78mm diameter.
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 100mm f2.8L Macro IS USM weighs 625g, 10% (75g) lighter than the Canon RF 24-105mm F4L IS's weight of 700g.
Filter Threads
The Canon RF 24-105mm F4L IS has a filter size of 77mm whereas the Canon 100mm f2.8L Macro IS USM has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Canon RF 24-105mm F4L IS:
And these are the 67mm filters that we recommend for the Canon 100mm f2.8L Macro IS USM:
Lens Mounts
The Canon RF 24-105mm F4L IS has the Canon RF lens mount whereas the Canon 100mm f2.8L Macro IS 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 24-105mm F4L IS has a focal range of 24-105mm and
4.4X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
38.4 - 168mm.
On the other hand, the Canon 100mm f2.8L Macro IS USM is a prime lens with fixed focal lenght of 100mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 160mm.