The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Otus 35mm f1.4 and the Viltrox AF 40mm f2.5 E 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 35mm f1.4 is the longer of the two lenses at 103mm. The Viltrox AF 40mm f2.5 E with a length of 56mm, is 47mm shorter. Besides being longer, the Zeiss Otus 35mm f1.4 also has a larger diameter of 77mm compared to the Viltrox AF 40mm f2.5 E's 68mm 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. Viltrox AF 40mm f2.5 E weighs 180g, 75% (557g) lighter than the Zeiss Otus 35mm f1.4's weight of 737g.
Filter Threads
The Zeiss Otus 35mm f1.4 has a filter size of 67mm whereas the Viltrox AF 40mm f2.5 E has a 52mm 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 35mm f1.4:
And these are the 52mm filters that we recommend for the Viltrox AF 40mm f2.5 E:
Lens Mounts
The Zeiss Otus 35mm f1.4 has the Nikon Z lens mount whereas the Viltrox AF 40mm f2.5 E has the Sony E 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 Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount.
Zeiss Otus 35mm f1.4 is also available in the Sony E and Canon RF mounts.
Focal Range
Zeiss Otus 35mm f1.4 is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
52.5mm.
On the other hand, the Viltrox AF 40mm f2.5 E is a prime lens with fixed focal lenght of 40mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 60mm.
