The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Otus 85mm f1.4 and the Sigma 28-105mm f2.8 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 28-105mm f2.8 is the longer of the two lenses at 158mm. The Zeiss Otus 85mm f1.4 with a length of 128mm, is 30mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 88mm.
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. Sigma 28-105mm f2.8 weighs 995g, 4% (45g) lighter than the Zeiss Otus 85mm f1.4's weight of 1040g.
Filter Threads
The Zeiss Otus 85mm f1.4 has a filter size of 77mm whereas the Sigma 28-105mm f2.8 has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 77mm filters that we recommend you to consider for the Zeiss Otus 85mm f1.4:
And these are the 82mm filters that we recommend for the Sigma 28-105mm f2.8:
Lens Mounts
The Zeiss Otus 85mm f1.4 has the Nikon Z lens mount whereas the Sigma 28-105mm f2.8 has the Leica L lens mount. Some of the latest released cameras that are compatible with these mounts are Nikon ZR, Nikon Z5 II and RED Komodo-X 6K Z for the Nikon Z Mount and Leica SL3-P, Panasonic S1 II and Panasonic S1 IIE for the Leica L Mount.
Zeiss Otus 85mm f1.4 is also available in the Canon EF , Nikon F (FX), Sony E and Canon RF mounts.
Sigma 28-105mm f2.8 is also available in Sony E mount.
Focal Range
Zeiss Otus 85mm f1.4 is a prime lens with fixed focal lenght of 85mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
127.5mm.
On the other hand, the Sigma 28-105mm f2.8 has a focal range of 28-105mm and 3.8X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 42 - 157.5mm.
