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 Sony FE 50mm F1.8 for their suitability to various photography scenarios:
Size and Weight Comparison
Size of a lens is an important deciding factor when comparing two lenses.Zeiss Batis 40mm F2 CF is the longer of the two lenses at 93mm. The Sony FE 50mm F1.8 with a length of 60mm is 33mm shorter. Besides being longer, the Zeiss Batis 40mm F2 CF also has a larger diameter of 91mm compared to Sony FE 50mm F1.8's 69mm diameter.
Weight of a lens is as important as its external dimensions, especially if you are planning to hand hold your camera and lens combination for longer periods. Sony FE 50mm F1.8 weighs 186g, 48% (175g) lighter than the Zeiss Batis 40mm F2 CF's weight of 361g.
Below you can find the dimension and weight table of the 'Standard Prime Lenses in Sony E Mount for size comparison purposes.
Standard Prime Lenses in Sony E Mount for Size Comparison
Both Zeiss Batis 40mm F2 CF and Sony FE 50mm F1.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony A7R V, Sony FX30 and Sony A7 IV.
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 an 35mm (FF) equivalent of 60mm.
Sony FE 50mm F1.8 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 an 35mm (FF) equivalent of 75mm.