The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Brightin AF 12mm F2.8 and the Fujinon MK 18-55mm T2.9 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. Fujinon MK 18-55mm T2.9 is the longer of the two lenses at 206mm. The Brightin AF 12mm F2.8 with a length of 97mm, is 109mm shorter. Besides being longer, the Fujinon MK 18-55mm T2.9 also has a larger diameter of 85mm compared to the Brightin AF 12mm F2.8's 70mm 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. Brightin AF 12mm F2.8 weighs 499g, which means it is 481g (49%) lighter than the Fujinon MK 18-55mm T2.9 which has a weight of 980g.
Filter Threads
The Brightin AF 12mm F2.8 has a filter size of 34mm whereas the Fujinon MK 18-55mm T2.9 has a 82mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 34mm filters that we recommend you to consider for the Brightin AF 12mm F2.8:
And these are the 82mm filters that we recommend for the Fujinon MK 18-55mm T2.9:
Lens Mounts
Both the Brightin AF 12mm F2.8 and the Fujinon MK 18-55mm T2.9 has the same Sony E lens mount. Some of the latest released cameras that are compatible with the Sony E lenses are Sony FX5, Sony A7R VI and Sony A7 V.
Focal Range
Brightin AF 12mm F2.8 is a prime lens with fixed focal lenght of 12mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
18mm.
On the other hand, the Fujinon MK 18-55mm T2.9 has a focal range of 18-55mm and 3.1X zoom ratio . When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of 27 - 82.5mm.
