The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 100mm F2.8L Macro IS and the Canon RF 85mm F1.2L 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 100mm F2.8L Macro IS is the longer of the two lenses at 148mm. The Canon RF 85mm F1.2L USM with a length of 117mm, is 31mm shorter. On the other hand, the Canon RF 85mm F1.2L USM has a larger diameter of 103mm compared to the Canon RF 100mm F2.8L Macro IS's 82mm diameter.
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Below you can find a scaled side-by-side image of Canon RF 100mm F2.8L Macro IS and Canon RF 85mm F1.2L USM to get a better idea of how their sizes compare in real life.
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 100mm F2.8L Macro IS weighs 730g, which means it is 465g (38%) lighter than the Canon RF 85mm F1.2L USM which has a weight of 1195g.
Filter Threads
The Canon RF 100mm F2.8L Macro IS has a filter size of 67mm whereas the Canon RF 85mm F1.2L USM has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Canon RF 100mm F2.8L Macro IS:
And these are the 82mm filters that we recommend for the Canon RF 85mm F1.2L USM:
Lens Mounts
Both the Canon RF 100mm F2.8L Macro IS and the Canon RF 85mm F1.2L USM has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R100, Canon R8 and Canon R50.
Focal Range
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.
On the other hand, the Canon RF 85mm F1.2L USM is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 136mm.