The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon 24mm F2.8 STM and the Rokinon 24mm f1.4 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 24mm F2.8 STM weighs 125g, which means it is 455g (78%) lighter than the Rokinon 24mm f1.4 which has a weight of 580g.
Filter Threads
The Canon 24mm F2.8 STM has a filter size of 52mm whereas the Rokinon 24mm f1.4 has a 77mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 52mm filters that we recommend you to consider for the Canon 24mm F2.8 STM:
And these are the 77mm filters that we recommend for the Rokinon 24mm f1.4:
Lens Mounts
The Canon 24mm F2.8 STM has the Canon EF-S lens mount whereas the Rokinon 24mm f1.4 has the Canon EF lens mount. Some of the latest released cameras that are compatible with these mounts are Canon T8i, Canon 90D and Canon SL3 for the Canon EF-S Mount and Canon 1D X III, Canon 6D MII and Canon 5D MIV for the Canon EF Mount.
Rokinon 24mm f1.4 is also available in Nikon F (FX) , Four Thirds, Pentax KAF, Sony Alpha and Samsung NX mounts.
Focal Range
Both lenses have the same focal range of
24mm but while Canon 24mm F2.8 STM has the fastest aperture of
F2.8, the Rokinon 24mm f1.4's widest aperture value is
F1.4.