Canon RF-S 7.8mm F4 STM Dual
Canon · 7.8 mm · f/4
Score Breakdown
Scores combine our editorial testing with published lab data.
49
SCORE /100
What We Like
+Sharp image quality throughout the image circle at f/4 with excellent optical design
+Dual STM autofocus system operates smoothly and quietly with good AF speed
+Extremely compact and lightweight at 130g, ideal for handheld VR shooting
+Affordable entry point for stereoscopic 3D content creation compared to professional alternatives
+11.8mm baseline length mimics human eye spacing for natural parallax and immersive VR effects
+Works seamlessly with Apple Vision Pro and Meta Quest 3 for 3D/spatial content playback
Worth Knowing
−No optical image stabilization; relies on camera body IBIS for stabilization
−Currently limited camera compatibility (primarily EOS R7, with R50 V support)
−No weather sealing, limiting outdoor durability in challenging conditions
−Servo autofocus not supported; focusing must be completed before recording starts
General | |
|---|---|
About This LensThe Canon RF-S 7.8mm F4 STM Dual Lens provides stereoscopic 3D dual image capture to a single imaging sensor, creating a unique still image or movie for use in VR content. This APS-C optical design enables a more compact overall size and reduces the cost to less than half that of the RF-S 3.9, making it even more accessible. The Canon RF-S 7.8mm F4 STM Dual Lens meets sharpness requirements, with real-world testing proving this lens is sharp throughout the image circle at f/4. This lens represents Canon's innovative approach to democratizing 3D content creation, bringing professional-level 3D capture capabilities to Canon's APS-C mirrorless system with a focus on simplicity and accessibility. | |
| 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 |
Physical57/100 | |
| Lens Weight | 130 g |
Lens Diameter ⓘWidth of the lens at its widest point | 69.2 mm |
Lens Length ⓘHow long the lens is from front to back. | 41.5 mm |
Front Filter Compatible ⓘSome lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove. |  Yes |
Front Filter Size ⓘDiameter of attachable filters. | 58 mm |
Optics65/100 | |
Focal Range ⓘShortest to longest focal length of the lens (zoom range start - end ) | 7.8 mm |
Aperture Range ⓘLargest aperture at the lens's shortest focal length to longest focal length (aperture range start - end) | 4 |
| Focal Length Angle of View | 63° |
Flange Focal Distance ⓘDistance from lens mount to sensor. | 20 mm |
Diaphragm Type ⓘStructure and design of the aperture |  Automatic |
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. | 15 cm01500 |
Maximum Magnification ⓘLargest size a subject can be reproduced | 0.07x |
| Autofocus Mode |  Yes |
| Manual Mode |  Yes |
| Manual Focusing Ring |  Yes |
Features | |
Weather Sealing ⓘWeather sealing capabilities will give you more confidence when shooting in unfavourable conditions. | No |
Fluorine Coating ⓘCoating to repel water and oil from lens elements. | No |
| Built In Lens Hood | No |
Teleconverter ⓘA teleconverter (extender) is an extra piece of equipment that fits between the lens and the camera body to enhance magnification | No |
| Image Stabilization | No |
Construction54/100 | |
Elements ⓘLens elements refer to individual pieces of glass within the lens. | 9 |
| Groups | 7 |
Aspherical Elements ⓘThe number of aspherical lens elements which can help correct aberrations such as spherical aberration. | 2 |
Bi Aspherical Elements ⓘElements with two non-spherical surfaces | 0 |
Low Dispersion ⓘElements that reduce chromatic aberration | 2 |
Super Low Dispersion ⓘAdvanced elements further reducing chromatic aberration | 0 |
CA Reduction ⓘBuilt-in features to reduce chromatic aberration | 0 |
Internal Focusing ⓘInternal Focusing means that the lens does not change in size during focusing, and the front element does not rotate. |  Yes |