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 Schneider PC 28mm f2.8 with a length of 89mm is 34mm shorter. Besides being longer, the Zeiss Milvus 25mm F1.4 also has a larger diameter of 95mm compared to Schneider PC 28mm f2.8's 75mm 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. Schneider PC 28mm f2.8 weighs 565g, 116% (660g) lighter than the Zeiss Milvus 25mm F1.4's weight of 1225g.
Both Zeiss Milvus 25mm F1.4 and Schneider PC 28mm f2.8 has the same Nikon F (FX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (FX) lenses are Nikon D6, Nikon D780 and Nikon D3500.
Zeiss Milvus 25mm F1.4 is also available in Canon EF mount.
Schneider PC 28mm f2.8 is also available in Canon EF , Pentax KAF and Sony Alpha mounts.
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.
Schneider PC 28mm f2.8 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.