The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 35mm F1.2 II and the Sirui 35mm F1.4 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 35mm F1.2 II is the longer of the two lenses at 111mm. The Sirui 35mm F1.4 with a length of 101mm, is 10mm shorter. Besides being longer, the Sigma 35mm F1.2 II also has a larger diameter of 81mm compared to the Sirui 35mm F1.4's 76mm 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. Sirui 35mm F1.4 weighs 494g, 34% (261g) lighter than the Sigma 35mm F1.2 II's weight of 755g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Leica L Mount for size comparison purposes.
Wideangle Lenses in Leica L Mount for Size Comparison
Filter Threads
The Sigma 35mm F1.2 II has a filter size of 72mm whereas the Sirui 35mm F1.4 has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 72mm filters that we recommend you to consider for the Sigma 35mm F1.2 II:
And these are the 62mm filters that we recommend for the Sirui 35mm F1.4:
Lens Mounts
Both the Sigma 35mm F1.2 II and the Sirui 35mm F1.4 has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE.
Sigma 35mm F1.2 II is also available in the Sony E mount.
Sirui 35mm F1.4 is also available in Sony E , Nikon Z and Fujifilm X mounts.
Focal Range
Both lenses have the same focal range of
35mm but while Sigma 35mm F1.2 II has the fastest aperture of
F1.2, the Sirui 35mm F1.4's widest aperture value is
F1.4.
