RF-S3.9mm f/3.5 STM Dual Fisheye
| Angle of View (Diagonal) | 144°00′ |
| Angle of View (Horizontal) | 144°00′ |
| Angle of View (Vertical) | 144°00′ |
| Closest Focusing Distance (m, ft) | 0.2 / 0.66 |
| Construction (Groups Elements) | 8,11 |
| Diameter x Length | 112.0 × 83.7 (height) x 54.6 |
| Distance Scale | - |
| Drive System | Gear-type STM |
| Filter Size | Screw-on filter (30.5mm) or gelatin filter can be attached to rear filter holder |
| Maximum Magnification (x) | 0.03x |
| Minimum Aperture | 16 |
| Number of Diaphragm Blades | 7 |
| Anti-dust and Moisture | Not Supported |
| Weight | 290 (without rear filter holder attached) |
| Accessories (Lens Cap) | Canon Lens Cap 3.9 (center pinch type) (included) |
| Accessories (Lens Hood) | Not Supported |
| Accessories (Lens Bag) | LS1014 (sold separately) |