The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Otus 28mm F1.4 and the Sigma 24mm F1.4 DG HSM A for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Zeiss Otus 28mm F1.4 is the longer of the two lenses at 137mm. The Sigma 24mm F1.4 DG HSM A with a length of 90mm is 47mm shorter. Besides being longer, the Zeiss Otus 28mm F1.4 also has a larger diameter of 88mm compared to Sigma 24mm F1.4 DG HSM A's 85mm diameter.
Below you can find the scaled side by side image of Zeiss Otus 28mm F1.4 and Sigma 24mm F1.4 DG HSM A to get a better idea of how their size compare in real life.
Comparison image of Zeiss Otus 28mm F1.4 and Sigma 24mm F1.4 DG HSM A Size and Weight 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 Canon EF Mount for size comparison purposes.
Wideangle Prime Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both Zeiss Otus 28mm F1.4 and Sigma 24mm F1.4 DG HSM A 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.
Zeiss Otus 28mm F1.4 is also available in Nikon F (FX) mount.
Sigma 24mm F1.4 DG HSM A is also available in Nikon F (FX) , Sigma SA and Leica L mounts.
Focal Range
Zeiss Otus 28mm F1.4 is a prime lens with fixed focal lenght of 28mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 42mm.
Sigma 24mm F1.4 DG HSM A 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.