Canon RF-S 3.9mm f/3.5 STM Dual Fisheye
Canon RF Mount

Canon RF-S 3.9mm f/3.5 STM Dual Fisheye

By Camera Reviews Editorial Team ยท Last updated February 18, 2026

3.9mm f/3.5

Focal Length
3.9mm
Max Aperture
f/3.5
Weight
290g

Full Specifications

Focal Length 3.9mm
Maximum Aperture f/3.5
Lens Mount RF
Autofocus Motor STM
Weight 290g
Dimensions 112.1 x 83.7 mm

What Users Think

Pros

  • Offers an immersive 3D capture experience with VR capabilities.
  • Lightweight design allows for portability and ease of use.
  • Effective for creating stereoscopic equirectangular VR180 footage.
  • Compatible with Canon's RF technology, ensuring integration with newer systems.
  • Compact size makes it suitable for various shooting scenarios.

Cons

  • Auto-focus only operates in still photo mode, limiting versatility for video.
  • Some users question the practical application of a dual fisheye lens for general photography.
  • Resolution limitations when compared to other cameras might impact quality expectations.
  • Focus distance is quite close, which can be limiting for some shots.

Community Verdict

The Canon RF-S 3.9mm f/3.5 STM Dual Fisheye lens receives mixed feedback. While it is praised for its unique 3D capture capabilities and lightweight design, concerns about its autofocus limitations and specific use cases in photography prevent it from being a universal recommendation for all users.

"{'text': 'With a VR setup like this, you film the waterfall and the mist just comes right at you.', 'context': 'Comment from user discussing the benefits of VR capture in the r/canon subreddit.'}"

- Reddit user

"{'text': "I personally would rather have 360 than stereo, but there's a market for this.", 'context': 'User expressing preference in the context of dual fisheye usage in r/canon.'}"

- Reddit user

"{'text': "Aren't both these dual lenses made for VR content creation?", 'context': 'Inquiry from a user considering the lens for soccer video capture in r/canon.'}"

- Reddit user

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Read our comprehensive review covering optical quality, sharpness, bokeh, autofocus performance, build quality, and more.

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Pairs Well With

Camera bodies compatible with the RF mount

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