The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony 12-24mm F2.8 GM and the Samyang 12mm f2.0 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. Sony 12-24mm F2.8 GM is the longer of the two lenses at 137mm. The Samyang 12mm f2.0 with a length of 59mm, is 78mm shorter. Besides being longer, the Sony 12-24mm F2.8 GM also has a larger diameter of 98mm compared to the Samyang 12mm f2.0's 73mm 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. Samyang 12mm f2.0 weighs 260g, 69% (587g) lighter than the Sony 12-24mm F2.8 GM's weight of 847g.
Lens Mounts
Both the Sony 12-24mm F2.8 GM and the Samyang 12mm f2.0 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.
Samyang 12mm f2.0 is also available in Canon EF-M , Fujifilm X, Micro Four Thirds and Samsung NX mounts.
Focal Range
Sony 12-24mm F2.8 GM 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.
On the other hand, the Samyang 12mm f2.0 is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of 18mm when used on a APS-C / DX format camera.
