The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 135mm f2.0L USM 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 135mm f2.0L USM with a length of 112mm, is 11mm shorter. On the other hand, the Canon 135mm f2.0L USM has a larger diameter of 83mm 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, 16% (125g) lighter than the Canon 135mm f2.0L USM's weight of 750g.
Filter Threads
The Canon 135mm f2.0L USM has a filter size of 72mm 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 72mm filters that we recommend you to consider for the Canon 135mm f2.0L USM:
And these are the 67mm filters that we recommend for the Canon 100mm f2.8L Macro IS USM:
Lens Mounts
Both the Canon 135mm f2.0L USM and the Canon 100mm f2.8L Macro IS USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Focal Range
Canon 135mm f2.0L 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.
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.
