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 101mm. The Sigma 17mm F4 DG DN C with a length of 49mm, is 52mm shorter. Besides being longer, the Sirui 35mm F1.4 also has a larger diameter of 76mm compared to the Sigma 17mm F4 DG DN C's 64mm 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 17mm F4 DG DN C weighs 225g, 54% (269g) lighter than the Sirui 35mm F1.4's weight of 494g.
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 Sirui 35mm F1.4 has a filter size of 62mm whereas the Sigma 17mm F4 DG DN C has a 55mm 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 55mm filters that we recommend for the Sigma 17mm F4 DG DN C:
Lens Mounts
Both the Sirui 35mm F1.4 and the Sigma 17mm F4 DG DN C 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.
Sirui 35mm F1.4 is also available in the Sony E , Nikon Z and Fujifilm X mounts.
Sigma 17mm F4 DG DN C is also available in Sony E mount.
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 Sigma 17mm F4 DG DN C is a prime lens with fixed focal lenght of 17mm.
