The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 20mm F2 DG DN C and the Sony 85mm F1.4 ZA CZ 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. Sony 85mm F1.4 ZA CZ is the longer of the two lenses at 73mm. The Sigma 20mm F2 DG DN C with a length of 72mm, is 1mm shorter. Besides being longer, the Sony 85mm F1.4 ZA CZ also has a larger diameter of 82mm compared to the Sigma 20mm F2 DG DN C's 70mm 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. Sigma 20mm F2 DG DN C weighs 370g, which means it is 190g (33%) lighter than the Sony 85mm F1.4 ZA CZ which has a weight of 560g.
Filter Threads
The Sigma 20mm F2 DG DN C has a filter size of 62mm whereas the Sony 85mm F1.4 ZA CZ has a 72mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sigma 20mm F2 DG DN C:
And these are the 72mm filters that we recommend for the Sony 85mm F1.4 ZA CZ:
Lens Mounts
The Sigma 20mm F2 DG DN C has the Sony E lens mount whereas the Sony 85mm F1.4 ZA CZ has the Sony Alpha lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Sony A99 II, Sony A68 and Sony A77 II for the Sony Alpha Mount.
Sigma 20mm F2 DG DN C is also available in the Leica L mount.
Focal Range
Sigma 20mm F2 DG DN C is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
30mm.
On the other hand, the Sony 85mm F1.4 ZA CZ 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.
