The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sigma 20mm F2 DG DN C and the Sigma 24mm F2 DG DN C for their suitability to various photography scenarios:
Size and Weight Comparison
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Below you can find a scaled side-by-side image of Sigma 20mm F2 DG DN C and Sigma 24mm F2 DG DN C to get a better idea of how their sizes compare in real life.
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 24mm F2 DG DN C weighs 365g, 1% (5g) lighter than the Sigma 20mm F2 DG DN C's weight of 370g.
Filter Threads
Both the Sigma 20mm F2 DG DN C and the Sigma 24mm F2 DG DN C have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Sigma 20mm F2 DG DN C and the Sigma 24mm F2 DG DN C has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Sigma 20mm F2 DG DN C is also available in Leica L mount.
Sigma 24mm F2 DG DN C is also available in Leica L mount.
Focal Range
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.
On the other hand, the Sigma 24mm F2 DG DN C is a prime lens with fixed focal lenght of 24mm which has an effective (full-frame 35mm equivalent) focal range of 36mm when used on a 35mm FF format camera.