The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Kamlan 8mm F3.0 Fisheye and the Sony FE 12-24mm F4 G 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. Kamlan 8mm F3.0 Fisheye weighs 245g, which means it is 320g (56%) lighter than the Sony FE 12-24mm F4 G which has a weight of 565g.
Lens Mounts
Both the Kamlan 8mm F3.0 Fisheye and the Sony FE 12-24mm F4 G has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony ZV-E10 II, Sony A6700 and Sony FX30.
Kamlan 8mm F3.0 Fisheye is also available in the Canon EF-M mount.
Focal Range
Kamlan 8mm F3.0 Fisheye is a prime lens with fixed focal lenght of 8mm which has an effective (full-frame 35mm equivalent) focal range of
12mm when used on a APS-C / DX format camera.
On the other hand, the Sony FE 12-24mm F4 G has a focal range of 12-24mm and 2.0X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 18 - 36mm.