The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 8-15mm f2.8 and the Sigma 20mm F2 DG DN C 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. Venus 8-15mm f2.8 is the longer of the two lenses at 76mm. The Sigma 20mm F2 DG DN C with a length of 72mm, is 4mm shorter. Besides being longer, the Venus 8-15mm f2.8 also has a larger diameter of 95mm 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, 43% (280g) lighter than the Venus 8-15mm f2.8's weight of 650g.
Lens Mounts
Both the Venus 8-15mm f2.8 and the Sigma 20mm F2 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.
Venus 8-15mm f2.8 is also available in the Sony E , Nikon Z and Canon RF mounts.
Sigma 20mm F2 DG DN C is also available in Sony E mount.
Focal Range
Venus 8-15mm f2.8 has a focal range of 8-15mm and
1.9X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
12 - 22.5mm.
On the other hand, the 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.
