The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Batis 18mm F2.8 and the Voigtlander 21mm F1.8 Ultron 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. Voigtlander 21mm F1.8 Ultron is the longer of the two lenses at 92mm. The Zeiss Batis 18mm F2.8 with a length of 80mm, is 12mm shorter. On the other hand, the Zeiss Batis 18mm F2.8 has a larger diameter of 78mm compared to the Voigtlander 21mm F1.8 Ultron's 62mm 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. Zeiss Batis 18mm F2.8 weighs 330g, which means it is 82g (19%) lighter than the Voigtlander 21mm F1.8 Ultron which has a weight of 412g.
Filter Threads
The Zeiss Batis 18mm F2.8 has a filter size of 77mm whereas the Voigtlander 21mm F1.8 Ultron has a 58mm 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 Batis 18mm F2.8:
And these are the 58mm filters that we recommend for the Voigtlander 21mm F1.8 Ultron:
Lens Mounts
The Zeiss Batis 18mm F2.8 has the Sony E lens mount whereas the Voigtlander 21mm F1.8 Ultron has the Leica M lens mount. Some of the latest released cameras that are compatible with these mounts are Sony FX5, Sony A7R VI and Sony A7 V for the Sony E Mount and Leica M EV1, Leica M11-D and Pixii Max for the Leica M Mount.
Focal Range
Zeiss Batis 18mm F2.8 is a prime lens with fixed focal lenght of 18mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
27mm.
On the other hand, the Voigtlander 21mm F1.8 Ultron is a prime lens with fixed focal lenght of 21mm.
