The type of photography that you are planning to use is an important decision factor. Here we have evaluated the Canon RF 5.2mm f2.8 VR and the Canon RF-S 3.9mm F3.5 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-S 3.9mm F3.5 is the longer of the two lenses at 55mm. The Canon RF 5.2mm f2.8 VR with a length of 53mm, is 2mm shorter. On the other hand, the Canon RF 5.2mm f2.8 VR has a larger diameter of 221mm compared to the Canon RF-S 3.9mm F3.5's 112mm 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-S 3.9mm F3.5 weighs 290g, 17% (62g) lighter than the Canon RF 5.2mm f2.8 VR's weight of 352g.
Lens Mounts
Both the Canon RF 5.2mm f2.8 VR and the Canon RF-S 3.9mm F3.5 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.
Focal Range
Canon RF 5.2mm f2.8 VR is a prime lens with fixed focal lenght of 5.2mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides a 35mm (FF) equivalent of
8mm.
On the other hand, the Canon RF-S 3.9mm F3.5 is a prime lens with fixed focal lenght of 3.9mm which has an effective (full-frame 35mm equivalent) focal range of 6.4mm when used on a APS-C / DX format camera.
