The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 24mm F14 2x Macro Probe and the Sigma 20mm F1.8 EX DG RF for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Venus 24mm F14 2x Macro Probe is the longer of the two lenses at 408mm. The Sigma 20mm F1.8 EX DG RF with a length of 90mm is 318mm shorter. On the other hand, the Sigma 20mm F1.8 EX DG RF has a larger diameter of 89mm compared to Venus 24mm F14 2x Macro Probe's 38mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Venus 24mm F14 2x Macro Probe weighs 474g, which means it is 46g (8%) lighter than the Sigma 20mm F1.8 EX DG RF which has a weight of 520g.
Lens Mounts
Both Venus 24mm F14 2x Macro Probe and Sigma 20mm F1.8 EX DG RF has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Canon 1D X III, Canon 6D MII and Canon 5D MIV.
Venus 24mm F14 2x Macro Probe is also available in Nikon F (FX) and Sony E mounts.
Sigma 20mm F1.8 EX DG RF is also available in Nikon F (DX) , Pentax KAF, Sony Alpha and Sigma SA mounts.
Focal Range
Venus 24mm F14 2x Macro Probe is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 38.4mm.
Sigma 20mm F1.8 EX DG RF is a prime lens with fixed focal lenght of 20mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 32mm.