The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 100mm f2.8 Macro USM and the Canon 100mm f2.0 USM 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 100mm f2.8 Macro USM is the longer of the two lenses at 119mm. The Canon 100mm f2.0 USM with a length of 74mm, is 45mm shorter. Besides being longer, the Canon 100mm f2.8 Macro USM also has a larger diameter of 79mm compared to the Canon 100mm f2.0 USM's 75mm diameter.
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 100mm f2.0 USM weighs 460g, 23% (140g) lighter than the Canon 100mm f2.8 Macro USM's weight of 600g.
Lens Mounts
Both the Canon 100mm f2.8 Macro USM and the Canon 100mm f2.0 USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Focal Range
Both lenses have the same focal range of 100mm but while Canon 100mm f2.8 Macro USM has the fastest aperture of F2.8, the Canon 100mm f2.0 USM's widest aperture value is F2.0.