The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Milvus 15mm F2.8 and the Sigma 14mm F1.8 DG HSM 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 14mm F1.8 DG HSM is the longer of the two lenses at 126mm. The Zeiss Milvus 15mm F2.8 with a length of 100mm, is 26mm shorter. On the other hand, the Zeiss Milvus 15mm F2.8 has a larger diameter of 102mm compared to the Sigma 14mm F1.8 DG HSM's 95mm diameter.
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. Zeiss Milvus 15mm F2.8 weighs 947g, which means it is 223g (19%) lighter than the Sigma 14mm F1.8 DG HSM which has a weight of 1170g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Canon EF Mount for size comparison purposes.
Ultra-Wideangle Lenses in Canon EF Mount for Size Comparison
Lens Mounts
Both the Zeiss Milvus 15mm F2.8 and the Sigma 14mm F1.8 DG HSM 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 Milvus 15mm F2.8 is also available in Nikon F (FX) mount.
Sigma 14mm F1.8 DG HSM is also available in Sigma SA and Nikon F (FX) mounts.
Focal Range
Zeiss Milvus 15mm F2.8 is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
24mm.
On the other hand, the Sigma 14mm F1.8 DG HSM is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 22.4mm.