The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Milvus 25mm F1.4 and the Nikon 20mm f1.8G ED 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 25mm F1.4 is the longer of the two lenses at 123mm. The Nikon 20mm f1.8G ED with a length of 81mm is 42mm shorter. Besides being longer, the Zeiss Milvus 25mm F1.4 also has a larger diameter of 95mm compared to Nikon 20mm f1.8G ED's 83mm 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. Nikon 20mm f1.8G ED weighs 355g, 71% (870g) lighter than the Zeiss Milvus 25mm F1.4's weight of 1225g.
Lens Mounts
Both Zeiss Milvus 25mm F1.4 has the Nikon F (FX) lens mount whereas the Nikon 20mm f1.8G ED has the Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (FX) Mount and Nikon D6, Nikon D780 and Nikon D3500 for the Nikon F (DX) Mount.
Zeiss Milvus 25mm F1.4 is also available in Canon EF mount.
Focal Range
Zeiss Milvus 25mm F1.4 is a prime lens with fixed focal lenght of 25mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 37.5mm.
Nikon 20mm f1.8G ED 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 an 35mm (FF) equivalent of 30mm.