The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 21mm F1.4 ED AS UMC CS and the ZEISS Loxia 21mm F2.8 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 Loxia 21mm F2.8 is the longer of the two lenses at 72mm. The Samyang 21mm F1.4 ED AS UMC CS with a length of 68mm is 4mm shorter. On the other hand, the Samyang 21mm F1.4 ED AS UMC CS has a larger diameter of 64mm compared to ZEISS Loxia 21mm F2.8's 62mm 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. Samyang 21mm F1.4 ED AS UMC CS weighs 275g, which means it is 119g (30%) lighter than the ZEISS Loxia 21mm F2.8 which has a weight of 394g.
Below you can find the dimension and weight table of the 'Wideangle Prime Lenses in Sony E Mount for size comparison purposes.
Wideangle Prime Lenses in Sony E Mount for Size Comparison
Lens Mounts
Both Samyang 21mm F1.4 ED AS UMC CS and ZEISS Loxia 21mm F2.8 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX30, Sony ZV-E10 and Sony A6600.
Samyang 21mm F1.4 ED AS UMC CS is also available in Canon EF-M , Fujifilm X and Micro Four Thirds mounts.
Focal Range