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Canon RF-S 3.9mm F3.5 STM Dual Fisheye
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Canon · f/3.5 · Canon RF-S mount

Canon RF-S 3.9mm F3.5 STM Dual Fisheye

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Mount
KEY FACTS
BrandCanon
Release Year2024
Production StatusIn Production
Lens MountCanon RF-S
SystemCanon EOS R (APS-C)
What We Like
+Single-sensor dual fisheye design eliminates multi-camera syncing and stitching complexity
+Sharp across entire image circle at f/3.5 with Air Sphere Coating reducing flare and ghosting
+Compact folded optical design at just 290g makes it extremely portable for travel
+144° wide field of view with 60mm interpupillary distance matches human vision for immersive 3D VR
+STM autofocus operates like standard RF lens for intuitive still shooting and pre-focus before video
+Affordable APS-C VR solution at $1,099-$1,299 vs $2,000+ for full-frame RF 5.2mm alternative
Worth Knowing
−Requires Canon EOS R7 firmware 1.5.0+ or R50 V for full VR functionality; limited camera compatibility
−No servo autofocus during video recording; manual focus or One-Shot AF required before filming
−144° field of view is narrower than full-frame RF 5.2mm (190°), resulting in less immersive VR experience
−Relies on Canon's subscription-based software (EOS VR Utility/Adobe Premiere Pro plugin) for VR file conversion and processing

General

Brand
Canon
Release Year
2024
Production Status
ⓘ
Current status of lens manufacturing (e.g., in production, discontinued).
In Production
Lens Mount
ⓘ
The lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras.
Canon RF-S
System
ⓘ
Indicates which camera system the lens is designed to attach to.
Canon EOS R (APS-C)
Maximum Format
ⓘ
Largest sensor size compatible with the lens.
APS-C
Read our notes on general
The Canon RF-S 3.9mm F3.5 STM Dual Fisheye features a folded optical design with separate left and right optical systems to capture stereoscopic 3D imagery with a 144° field of view to a single APS-C image sensor. The lens is sharp throughout the entire image circle at f/3.5 with little improvement through f/5.6. It is the first non-L series lens to feature Canon's Air Sphere Coating. Compared to the full-frame RF 5.2mm F2.8 L Dual Fisheye, the APS-C RF-S 3.9 is more affordable and designed for accessible VR content creation.

Physical

Lens Weight
290 g
Lens Diameter
ⓘ
Width of the lens at its widest point
112.1 mm
Lens Length
ⓘ
How long the lens is from front to back.
83.7 mm

Optics

Focal Range
ⓘ
Shortest to longest focal length of the lens (zoom range start - end )
3.9 mm
Aperture Range
ⓘ
Largest aperture at the lens's shortest focal length to longest focal length (aperture range start - end)
3.5
Blades
ⓘ
Number of diaphragm blades in aperture
7020
Zoom Lens
ⓘ
Zoom allows you to vary the focal length, change between long shots and close-ups
No
Closest Focusing Distance
ⓘ
Minimum distance for a subject to be in focus.
20 cm01500
Autofocus Mode
Yes

Features

Weather Sealing
ⓘ
Weather sealing capabilities will give you more confidence when shooting in unfavourable conditions.
No