The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Otus 50mm f1.4 and the Sigma 45mm F2.8 DG DN C 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. Zeiss Otus 50mm f1.4 is the longer of the two lenses at 100mm. The Sigma 45mm F2.8 DG DN C with a length of 46mm, is 54mm shorter. Besides being longer, the Zeiss Otus 50mm f1.4 also has a larger diameter of 77mm compared to the Sigma 45mm F2.8 DG DN C's 64mm diameter.
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 45mm F2.8 DG DN C weighs 215g, 68% (462g) lighter than the Zeiss Otus 50mm f1.4's weight of 677g.
Filter Threads
The Zeiss Otus 50mm f1.4 has a filter size of 67mm whereas the Sigma 45mm F2.8 DG DN C has a 55mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Zeiss Otus 50mm f1.4:
And these are the 55mm filters that we recommend for the Sigma 45mm F2.8 DG DN C:
Lens Mounts
The Zeiss Otus 50mm f1.4 has the Nikon Z lens mount whereas the Sigma 45mm F2.8 DG DN C 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 50mm f1.4 is also available in the Sony E and Canon RF mounts.
Sigma 45mm F2.8 DG DN C is also available in Sony E mount.
Focal Range
Zeiss Otus 50mm f1.4 is a prime lens with fixed focal lenght of 50mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
75mm.
On the other hand, the Sigma 45mm F2.8 DG DN C is a prime lens with fixed focal lenght of 45mm.
