The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Zeiss Batis 40mm F2 CF and the Kamlan 55mm F1.2 for their suitability to various photography scenarios:
Size and Weight Comparison
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 40mm F2 CF weighs 361g, which means it is 339g (48%) lighter than the Kamlan 55mm F1.2 which has a weight of 700g.
Below you can find the dimension and weight table of the Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Lenses in Sony E Mount for Size Comparison
Filter Threads
The Zeiss Batis 40mm F2 CF has a filter size of 67mm whereas the Kamlan 55mm F1.2 has a 62mm 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 Batis 40mm F2 CF:
And these are the 62mm filters that we recommend for the Kamlan 55mm F1.2:
Lens Mounts
Both the Zeiss Batis 40mm F2 CF and the Kamlan 55mm F1.2 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A9 III, Sony A7C Mark II and Sony A7CR.
Focal Range
Zeiss Batis 40mm F2 CF 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.
On the other hand, the Kamlan 55mm F1.2 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.