The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Olympus ED 7-14mm F2.8 PRO 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. Olympus ED 7-14mm F2.8 PRO is the longer of the two lenses at 106mm. The Samyang 12mm f2.0 with a length of 59mm, is 47mm shorter. Besides being longer, the Olympus ED 7-14mm F2.8 PRO also has a larger diameter of 79mm 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, 51% (274g) lighter than the Olympus ED 7-14mm F2.8 PRO's weight of 534g.
Lens Mounts
Both the Olympus ED 7-14mm F2.8 PRO and the Samyang 12mm f2.0 has the same Micro Four Thirds lens mount. Some of the latest released cameras that are compatible with the Micro Four Thirds lenses are OM System OM-3 Astro, OM System OM-5 II and OM System OM-3.
Samyang 12mm f2.0 is also available in Canon EF-M , Fujifilm X, Sony E and Samsung NX mounts.
Focal Range
Olympus ED 7-14mm F2.8 PRO has a focal range of 7-14mm and
2.0X zoom ratio which has an effective (full-frame 35mm equivalent) focal range of
14-28mm when used on a FourThirds 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.
