The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 16mm F2.8 STM and the Samyang AF 14mm F2.8 EF 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. Samyang AF 14mm F2.8 EF is the longer of the two lenses at 96mm. The Canon RF 16mm F2.8 STM with a length of 40mm, is 56mm shorter. Besides being longer, the Samyang AF 14mm F2.8 EF also has a larger diameter of 91mm compared to the Canon RF 16mm F2.8 STM's 69mm 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. Canon RF 16mm F2.8 STM weighs 165g, which means it is 320g (65%) lighter than the Samyang AF 14mm F2.8 EF which has a weight of 485g.
Lens Mounts
The Canon RF 16mm F2.8 STM has the Canon RF lens mount whereas the Samyang AF 14mm F2.8 EF has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R100, Canon R8 and Canon R50 for the Canon RF Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Focal Range
Canon RF 16mm F2.8 STM is a prime lens with fixed focal lenght of 16mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
25.6mm.
On the other hand, the Samyang AF 14mm F2.8 EF is a prime lens with fixed focal lenght of 14mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 22.4mm.