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 10mm 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. Samyang 10mm f2.8 is the longer of the two lenses at 77mm. The Canon RF 16mm F2.8 STM with a length of 40mm, is 37mm shorter. Besides being longer, the Samyang 10mm f2.8 also has a larger diameter of 86mm 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 415g (71%) lighter than the Samyang 10mm f2.8 which has a weight of 580g.
Lens Mounts
The Canon RF 16mm F2.8 STM has the Canon RF lens mount whereas the Samyang 10mm f2.8 has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon R6 V, Canon R6 III and Canon C50 for the Canon RF Mount and Canon T8i, Canon 90D and Canon SL3 for the Canon EF Mount.
Samyang 10mm f2.8 is also available in Canon EF-M , Fujifilm X, Nikon F (DX), Four Thirds and Micro Four Thirds mounts.
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 10mm f2.8 is a prime lens with fixed focal lenght of 10mm which has an effective (full-frame 35mm equivalent) focal range of 16mm when used on a APS-C / DX format camera.
