The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 85mm F1.4 EX DG HSM and the Schneider PC-TS 4.5/90 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. Schneider PC-TS 4.5/90 is the longer of the two lenses at 139mm. The Sigma 85mm F1.4 EX DG HSM with a length of 88mm, is 51mm shorter. Besides being longer, the Schneider PC-TS 4.5/90 also has a larger diameter of 108mm compared to the Sigma 85mm F1.4 EX DG HSM's 86mm 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. Sigma 85mm F1.4 EX DG HSM weighs 725g, which means it is 385g (34%) lighter than the Schneider PC-TS 4.5/90 which has a weight of 1110g.
Lens Mounts
Both the Sigma 85mm F1.4 EX DG HSM and the Schneider PC-TS 4.5/90 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.
Sigma 85mm F1.4 EX DG HSM is also available in Nikon F (FX) , Pentax KAF3, Sony Alpha and Sigma SA mounts.
Schneider PC-TS 4.5/90 is also available in Nikon F (FX) , Pentax KAF and Sony Alpha mounts.
Focal Range
Sigma 85mm F1.4 EX DG HSM 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.
Schneider PC-TS 4.5/90 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.