The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus Laowa 4mm F2.8 L 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. Sigma 20mm F2 DG DN C is the longer of the two lenses at 72mm. The Venus Laowa 4mm F2.8 L with a length of 26mm, is 46mm shorter. Besides being longer, the Sigma 20mm F2 DG DN C also has a larger diameter of 70mm compared to the Venus Laowa 4mm F2.8 L's 61mm diameter.
Below you can find a scaled side-by-side image of Venus Laowa 4mm F2.8 L and Sigma 20mm F2 DG DN C to get a better idea of how their sizes compare in real life.
Comparison image of the Venus Laowa 4mm F2.8 L and the Sigma 20mm F2 DG DN C Size and Weight 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 4mm F2.8 L weighs 135g, which means it is 235g (63%) lighter than the Sigma 20mm F2 DG DN C which has a weight of 370g.
Below you can find the dimension and weight table of the Wideangle Fisheye Prime Lenses in Leica L Mount for size comparison purposes.
Ultra-Wideangle Leica L Mount
Lens Mounts
Both the Venus Laowa 4mm F2.8 L 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 TL2 , Leica TL and Leica T Typ 701 .
Sony E mount.
Focal Range
Venus Laowa 4mm F2.8 L is a prime lens with fixed focal lenght of 4mm which has an effective (full-frame 35mm equivalent) focal range of
6mm when used on a APS-C / DX format camera.
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 .
