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 Sigma 85mm F1.4 DG HSM 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 Sigma 85mm F1.4 DG HSM with a length of 126mm, is 13mm shorter. On the other hand, the Sigma 85mm F1.4 DG HSM has a larger diameter of 95mm compared to the Sigma 135mm F1.8 DG HSM A's 91mm diameter.
Below you can find a scaled side-by-side image of Sigma 135mm F1.8 DG HSM A and Sigma 85mm F1.4 DG HSM 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 Sigma 85mm F1.4 DG HSM 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.
Filter Threads
The Sigma 135mm F1.8 DG HSM A has a filter size of 82mm whereas the Sigma 85mm F1.4 DG HSM has a 86mm 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 86mm filters that we recommend for the Sigma 85mm F1.4 DG HSM:
Lens Mounts
The Sigma 135mm F1.8 DG HSM A has the Leica L lens mount whereas the Sigma 85mm F1.4 DG HSM has the Canon EF 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 Blackmagic URSA 12K LF , Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K for the Canon EF Mount.
Sigma SA and Nikon F (FX) mounts.
Focal Range
Sigma 135mm F1.8 DG HSM A is a prime lens with fixed focal lenght of 135mm.
On the other hand, the Sigma 85mm F1.4 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 .
