The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Samyang 24mm f1.4 and the Canon 35mm f2 IS USM for their suitability to various photography scenarios:
Size and Weight Comparison
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 35mm f2 IS USM weighs 335g, 42% (245g) lighter than the Samyang 24mm f1.4's weight of 580g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Canon EF Mount for size comparison purposes.
Wideangle Lenses in Canon EF Mount for Size Comparison
Filter Threads
The Samyang 24mm f1.4 has a filter size of 77mm whereas the Canon 35mm f2 IS USM 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 77mm filters that we recommend you to consider for the Samyang 24mm f1.4:
And these are the 67mm filters that we recommend for the Canon 35mm f2 IS USM:
Lens Mounts
Both the Samyang 24mm f1.4 and the Canon 35mm f2 IS USM has the same Canon EF lens mount. Some of the latest released cameras that are compatible with the Canon EF lenses are Blackmagic URSA 12K LF, Z CAM E2-F6 II 6K and Z CAM E2-S6 II 6K.
Samyang 24mm f1.4 is also available in the Nikon F (FX) , Four Thirds, Pentax KAF, Sony Alpha, Sony E and Samsung NX mounts.
Focal Range
Samyang 24mm f1.4 is a prime lens with fixed focal lenght of 24mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
38.4mm.
On the other hand, the Canon 35mm f2 IS USM is a prime lens with fixed focal lenght of 35mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of 56mm.