Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Sigma 28mm F1.4 DG HSM A is the longer of the two lenses at 108mm. The Sigma 24mm F2 DG DN C with a length of 72mm is 36mm shorter. Besides being longer, the Sigma 28mm F1.4 DG HSM A also has a larger diameter of 83mm compared to Sigma 24mm F2 DG DN C's 70mm 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.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Leica L Mount for size comparison purposes.
Wideangle Prime Lenses in Leica L Mount for Size Comparison
Both Sigma 24mm F2 DG DN C and Sigma 28mm F1.4 DG HSM A has the same Leica L lens mount. Some of the latest released cameras that are compatible with the Leica L lenses are Sigma fp L, Leica SL2-S and Panasonic S5.
Sigma 24mm F2 DG DN C is also available in Sony E mount.
Sigma 28mm F1.4 DG HSM A is also available in Canon EF , Nikon F (FX), Sigma SA and Sony E mounts.
Sigma 24mm F2 DG DN C is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 36mm.
Sigma 28mm F1.4 DG HSM A is a prime lens with fixed focal lenght of 28mm.