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 7artisans 12mm 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. Sony 12-24mm F2.8 GM is the longer of the two lenses at 137mm. The 7artisans 12mm F2.8 with a length of 66mm, is 71mm shorter. Besides being longer, the Sony 12-24mm F2.8 GM also has a larger diameter of 98mm compared to the 7artisans 12mm F2.8's 63mm diameter.
Below you can find a scaled side-by-side image of Sony 12-24mm F2.8 GM and 7artisans 12mm F2.8 to get a better idea of how their sizes compare in real life.
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. 7artisans 12mm F2.8 weighs 295g, 65% (552g) lighter than the Sony 12-24mm F2.8 GM's weight of 847g.
Both the Sony 12-24mm F2.8 GM and the 7artisans 12mm 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 A9 III, Sony A7C Mark II and Sony A7CR.
7artisans 12mm F2.8 is also available in Canon EF-M and Fujifilm X mounts.
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 7artisans 12mm F2.8 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.