The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 135mm F1.8 L IS USM and the Canon RF 100mm F2.8L Macro IS for their suitability to various photography scenarios:
Size and Weight Comparison
The size of a lens is an important deciding factor when comparing two lenses. Canon RF 100mm F2.8L Macro IS is the longer of the two lenses at 148mm. The Canon RF 135mm F1.8 L IS USM with a length of 130mm, is 18mm shorter. On the other hand, the Canon RF 135mm F1.8 L IS USM has a larger diameter of 89mm compared to the Canon RF 100mm F2.8L Macro IS's 82mm diameter.
Below you can find a scaled side-by-side image of Canon RF 135mm F1.8 L IS USM and Canon RF 100mm F2.8L Macro IS to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 135mm F1.8 L IS USM and the Canon RF 100mm F2.8L Macro IS Size and Weight The weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Canon RF 100mm F2.8L Macro IS weighs 730g, 21% (205g) lighter than the Canon RF 135mm F1.8 L IS USM's weight of 935g.
Lens Mounts
Both the Canon RF 135mm F1.8 L IS USM and the Canon RF 100mm F2.8L Macro IS has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R8, Canon R50 and Canon R6 II.
Focal Range
Canon RF 135mm F1.8 L IS USM is a prime lens with fixed focal lenght of 135mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 216mm.
Canon RF 100mm F2.8L Macro IS 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.