The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 135mm F1.8 DG HSM A and the Sony FE 85mm F1.4 GM II 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. Sigma 135mm F1.8 DG HSM A is the longer of the two lenses at 139mm. The Sony FE 85mm F1.4 GM II with a length of 107mm, is 32mm shorter. Besides being longer, the Sigma 135mm F1.8 DG HSM A also has a larger diameter of 91mm compared to the Sony FE 85mm F1.4 GM II's 85mm diameter.
Below you can find a scaled side-by-side image of Sigma 135mm F1.8 DG HSM A and Sony FE 85mm F1.4 GM II to get a better idea of how their sizes compare in real life.
Comparison image of the Sigma 135mm F1.8 DG HSM A and the Sony FE 85mm F1.4 GM II Size and Weight 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. Sony FE 85mm F1.4 GM II weighs 642g, 43% (488g) lighter than the Sigma 135mm F1.8 DG HSM A's weight of 1130g.
Filter Threads
The Sigma 135mm F1.8 DG HSM A has a filter size of 82mm whereas the Sony FE 85mm F1.4 GM II has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 82mm filters that we recommend you to consider for the Sigma 135mm F1.8 DG HSM A:
And these are the 77mm filters that we recommend for the Sony FE 85mm F1.4 GM II:
Lens Mounts
The Sigma 135mm F1.8 DG HSM A has the Leica L lens mount whereas the Sony FE 85mm F1.4 GM II has the Sony E lens mount . Some of the latest released cameras that are compatible with these mounts are Leica SL3-P , Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount and Sony FX5 , Sony A7R VI and Sony A7 V for the Sony E Mount.
Focal Range
Sigma 135mm F1.8 DG HSM A is a prime lens with fixed focal lenght of 135mm.
On the other hand, the Sony FE 85mm F1.4 GM II is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 127.5mm .
