The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Tamron 85mm F1.8 VC and the Zeiss Otus 85mm F1.4 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 85mm F1.4 is the longer of the two lenses at 138mm. The Tamron 85mm F1.8 VC with a length of 91mm is 47mm shorter. Besides being longer, the Zeiss Otus 85mm F1.4 also has a larger diameter of 101mm compared to Tamron 85mm F1.8 VC's 85mm 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. Tamron 85mm F1.8 VC weighs 700g, which means it is 440g (38%) lighter than the Zeiss Otus 85mm F1.4 which has a weight of 1140g.
Below you can find the dimension and weight table of the 'Telephoto Prime Lenses in Nikon F (FX) Mount for size comparison purposes.
Telephoto Prime Lenses in Nikon F (FX) Mount for Size Comparison
Both Tamron 85mm F1.8 VC and Zeiss Otus 85mm F1.4 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.
Tamron 85mm F1.8 VC is also available in Sony Alpha and Canon EF mounts.
Zeiss Otus 85mm F1.4 is also available in Canon EF mount.