The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony CZ T* E 24mm F1.8 ZA and the ZEISS Loxia 21mm F2.8 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 Loxia 21mm F2.8 is the longer of the two lenses at 72mm. The Sony CZ T* E 24mm F1.8 ZA with a length of 66mm, is 6mm shorter. On the other hand, the Sony CZ T* E 24mm F1.8 ZA has a larger diameter of 63mm compared to the ZEISS Loxia 21mm F2.8'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. Sony CZ T* E 24mm F1.8 ZA weighs 225g, which means it is 169g (42%) 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 Lenses in Sony E Mount for Size Comparison
Filter Threads
The Sony CZ T* E 24mm F1.8 ZA has a filter size of 49mm whereas the ZEISS Loxia 21mm F2.8 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 49mm filters that we recommend you to consider for the Sony CZ T* E 24mm F1.8 ZA:
And these are the 52mm filters that we recommend for the ZEISS Loxia 21mm F2.8:
Lens Mounts
Both the Sony CZ T* E 24mm F1.8 ZA and the 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 A6700, Sony FX30 and Sony ZV-E10.
Focal Range
Sony CZ T* E 24mm F1.8 ZA is a prime lens with fixed focal lenght of 24mm which has an effective (full-frame 35mm equivalent) focal range of
36mm when used on a APS-C / DX format camera.
On the other hand, the ZEISS Loxia 21mm F2.8 is a prime lens with fixed focal lenght of 21mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 31.5mm.