The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sirui 35mm F1.4 and the Sony FE 20mm F1.8 G 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. Sirui 35mm F1.4 is the longer of the two lenses at 103mm. The Sony FE 20mm F1.8 G with a length of 85mm, is 18mm shorter. Besides being longer, the Sirui 35mm F1.4 also has a larger diameter of 76mm compared to the Sony FE 20mm F1.8 G'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. Sony FE 20mm F1.8 G weighs 373g, 23% (117g) lighter than the Sirui 35mm F1.4's weight of 490g.
Filter Threads
The Sirui 35mm F1.4 has a filter size of 62mm whereas the Sony FE 20mm F1.8 G has a 67mm 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 Sirui 35mm F1.4:
And these are the 67mm filters that we recommend for the Sony FE 20mm F1.8 G:
Lens Mounts
The Sirui 35mm F1.4 has the Fujifilm X lens mount whereas the Sony FE 20mm F1.8 G has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Fujifilm X-T30 III, Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Sirui 35mm F1.4 is also available in the Sony E , Nikon Z and Leica L mounts.
Focal Range
Sirui 35mm F1.4 is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
52.5mm.
On the other hand, the Sony FE 20mm F1.8 G 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.
