Size and Weight Comparison
The size of a lens is a crucial factor to consider when comparing two lenses. Sigma 17mm F4 DG DN C is the longer of the two lenses at 51mm. The Venus Laowa 15mm f5 with a length of 25mm, is 26mm shorter. Besides being longer, the Sigma 17mm F4 DG DN C also has a larger diameter of 64mm compared to the Venus Laowa 15mm f5's 53mm 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. Venus Laowa 15mm f5 weighs 158g, which means it is 62g (28%) lighter than the Sigma 17mm F4 DG DN C which has a weight of 220g.
Filter Threads
The Venus Laowa 15mm f5 has a filter size of 39mm 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 39mm filters that we recommend you to consider for the Venus Laowa 15mm f5:
And these are the 55mm filters that we recommend for the Sigma 17mm F4 DG DN C:
Lens Mounts
The Venus Laowa 15mm f5 has the Canon RF lens mount whereas the Sigma 17mm F4 DG DN C has the Sony E lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Venus Laowa 15mm f5 is also available in the Sony E , Nikon Z and Leica L mounts.
Sigma 17mm F4 DG DN C is also available in Leica L mount.
Focal Range
Venus Laowa 15mm f5 is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
22.5mm.
On the other hand, the Sigma 17mm F4 DG DN C is a prime lens with fixed focal lenght of 17mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 25.5mm.
