The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 85mm f1.8 USM and the Canon TS-E 90mm f2.8 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 TS-E 90mm f2.8 is the longer of the two lenses at 88mm. The Canon 85mm f1.8 USM with a length of 72mm, is 16mm shorter. On the other hand, the Canon 85mm f1.8 USM has a larger diameter of 75mm compared to the Canon TS-E 90mm f2.8's 74mm 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 85mm f1.8 USM weighs 425g, which means it is 140g (24%) lighter than the Canon TS-E 90mm f2.8 which has a weight of 565g.
Filter Threads
Both the Canon 85mm f1.8 USM and the Canon TS-E 90mm f2.8 have the same Filter thread size of 58mm.
Below are links to the 58mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Canon 85mm f1.8 USM and the Canon TS-E 90mm f2.8 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
Canon 85mm f1.8 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.
On the other hand, the Canon TS-E 90mm f2.8 is a prime lens with fixed focal lenght of 90mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 144mm.