The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 28-70mm F2.8 and the Samyang AF 12mm f2 X 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. Canon RF 28-70mm F2.8 is the longer of the two lenses at 92mm. The Samyang AF 12mm f2 X with a length of 65mm, is 27mm shorter. Besides being longer, the Canon RF 28-70mm F2.8 also has a larger diameter of 77mm compared to the Samyang AF 12mm f2 X's 70mm diameter.
Below you can find a scaled side-by-side image of Canon RF 28-70mm F2.8 and Samyang AF 12mm f2 X to get a better idea of how their sizes compare in real life.
Comparison image of the Canon RF 28-70mm F2.8 and the Samyang AF 12mm f2 X Size and Weight 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 AF 12mm f2 X weighs 212g, 57% (282g) lighter than the Canon RF 28-70mm F2.8's weight of 494g.
Filter Threads
The Canon RF 28-70mm F2.8 has a filter size of 67mm whereas the Samyang AF 12mm f2 X has a 62mm diameter. Larger filters are generally more expensive than the smaller ones given all the other features are equal.
Below are links to the 67mm filters that we recommend you to consider for the Canon RF 28-70mm F2.8:
And these are the 62mm filters that we recommend for the Samyang AF 12mm f2 X:
Lens Mounts
The Canon RF 28-70mm F2.8 has the Canon RF lens mount whereas the Samyang AF 12mm f2 X has the Fujifilm X 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 Fujifilm X-T30 III , Fujifilm X-E5 and Fujifilm X-M5 for the Fujifilm X Mount.
Focal Range
Canon RF 28-70mm F2.8 has a focal range of 28-70mm and
2.5X zoom ratio . When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
44.8 - 112mm .
On the other hand, the Samyang AF 12mm f2 X 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.
