Canon RF-S 7.8mm f/4.0 Dual Fisheye
The RF-S 7.8mm f/4.0 Dual Fisheye is a high-performance RF-S standard prime lens engineered for Canon EOS R system mirrorless cameras. Features STM autofocus, and premium optical coatings.
Whether you're a seasoned professional or an enthusiast stepping up, the Canon RF-S 7.8mm f/4.0 Dual Fisheye offers a compelling balance of performance and utility. At just 130 g (4.6 oz), its remarkably compact design makes it an easy addition to any camera bag.
When mounted on a high-resolution R-series body, the image quality simply speaks for itself. The STM motor ensures smooth, quiet focusing adjustments, particularly beneficial during video capture. While lacking L-series weather sealing, its build quality remains robust and practical for everyday shooting.
It strikes a brilliant balance between performance, usability, and value for the modern creator. It pairs perfectly with a 70-200mm to complete your kit.
✅ Strengths
- Ultra-compact and lightweight design (130 g (4.6 oz))
- Customizable Control Ring for aperture, ISO, or exposure compensation
⚠️ Considerations
- No professional weather-sealing gaskets (use caution in rain or dust)
- No in-lens optical stabilization (relies on camera body IBIS only)
- Stepping motor (STM) autofocus may be slower than USM for fast-action tracking
Full Technical Specifications
| Lens Model | Canon RF-S 7.8mm f/4.0 Dual Fisheye |
| Lens Mount | Canon RF |
| Sensor Format | APS-C |
| Optical Construction | 7 elements in 7 groups per optical path |
| Special Glass & Optics | Optimized for Apple Vision Pro Spatial Video capture |
| Min. Focus Distance | 0.15 m (5.9 in) |
| Max. Magnification | 0.07x |
| Image Stabilization | Electronic spatial video stabilization |
| Diaphragm Blades | 7 |
| Autofocus Motor | STM |
| Filter Diameter | 58 mm |
| Dimensions (D × L) | 69.2 mm (2.72 in) × 41.5 mm (1.63 in) |
| Weight | 130 g (4.6 oz) |
| Lens Hood | Built-in / None |
| Release Date | 2024-10-30 |
| Series Classification | Standard |
| Estimated MSRP | $1,099 |
Features & Optical Technology
Recommended Photography Genres
Frequently Asked Questions
Q: Is the RF-S 7.8mm f/4.0 Dual Fisheye weather sealed?
A: No, this lens does not feature professional weather sealing. It is recommended to use caution or a rain cover when shooting in wet or dusty conditions.
Q: What size filter does the RF-S 7.8mm f/4.0 Dual Fisheye use?
A: The lens features a 58 mm front filter thread. Any circular filters (like UV, CPL, or ND) will need to match this 58 mm diameter.
Q: Can I use this RF-S lens on a full-frame Canon EOS R camera?
A: Yes, you can mount RF-S lenses on full-frame RF cameras. The camera will automatically enter a 1.6x crop mode, capturing a cropped image with a field of view equivalent to 12mm.
✓ Includes configurable electronic Control Ring for aperture, ISO, or shutter speed.