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 Canon 15mm f2.8 Fisheye 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 Milvus 15mm F2.8 is the longer of the two lenses at 100mm. The Canon 15mm f2.8 Fisheye with a length of 62mm is 38mm shorter. Besides being longer, the Zeiss Milvus 15mm F2.8 also has a larger diameter of 102mm compared to Canon 15mm f2.8 Fisheye's 73mm 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. Canon 15mm f2.8 Fisheye weighs 330g, 65% (617g) lighter than the Zeiss Milvus 15mm F2.8's weight of 947g.
Lens Mounts
Both Zeiss Milvus 15mm F2.8 and Canon 15mm f2.8 Fisheye 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.
Focal Range
Both lenses have the same focal range of 15mm and the fastest aperture of F2.8.