The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Sony E 10-18mm F4 OSS 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 E 10-18mm F4 OSS is the longer of the two lenses at 64mm. The Samyang 12mm f2.0 with a length of 59mm, is 5mm shorter. On the other hand, the Samyang 12mm f2.0 has a larger diameter of 73mm compared to the Sony E 10-18mm F4 OSS'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. Sony E 10-18mm F4 OSS weighs 225g, which means it is 35g (13%) lighter than the Samyang 12mm f2.0 which has a weight of 260g.
Filter Threads
The Sony E 10-18mm F4 OSS has a filter size of 62mm whereas the Samyang 12mm f2.0 has a 67mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 62mm filters that we recommend you to consider for the Sony E 10-18mm F4 OSS:
And these are the 67mm filters that we recommend for the Samyang 12mm f2.0:
Lens Mounts
Both the Sony E 10-18mm F4 OSS 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 A6700, Sony FX30 and Sony ZV-E10.
Samyang 12mm f2.0 is also available in Canon EF-M , Fujifilm X, Micro Four Thirds and Samsung NX mounts.
Focal Range
Sony E 10-18mm F4 OSS has a focal range of 10-18mm and
1.8X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
15-27mm when used on a APS-C / DX format camera.
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.