The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Venus 15mm f4.5 and the Samyang AF 12mm f2 RF-S 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 12mm f2 RF-S is the longer of the two lenses at 63mm. The Venus 15mm f4.5 with a length of 48mm, is 15mm shorter. On the other hand, there is no difference between the max diameters of these lenses, both coming at 70mm.
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 RF-S weighs 213g, 30% (95g) lighter than the Venus 15mm f4.5's weight of 308g.
Below you can find the dimension and weight table of the Wideangle Prime Lenses in Canon RF Mount for size comparison purposes.
Ultra-Wideangle Lenses in Canon RF Mount for Size Comparison
Filter Threads
Both the Venus 15mm f4.5 and the Samyang AF 12mm f2 RF-S have the same Filter thread size of 62mm.
Below are links to the 62mm filters that we recommend you to consider for these lenses:
Lens Mounts
Both the Venus 15mm f4.5 and the Samyang AF 12mm f2 RF-S has the same Canon RF lens mount. Some of the latest released cameras that are compatible with the Canon RF lenses are Canon R6 V, Canon R6 III and Canon C50.
Venus 15mm f4.5 is also available in the Sony E , Nikon Z and Leica L mounts.
Focal Range
Venus 15mm f4.5 is a prime lens with fixed focal lenght of 15mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides a 35mm (FF) equivalent of
22.5mm.
On the other hand, the Samyang AF 12mm f2 RF-S is a prime lens with fixed focal lenght of 12mm which has an effective (full-frame 35mm equivalent) focal range of 19.2mm when used on a APS-C / DX format camera.
