Canon RF 5.2mm f/2.8 L Dual Fisheye vs Canon RF 50mm f/1.2 L USM
The bottom line
These cover different focal lengths — the Canon RF 5.2mm f/2.8 L Dual Fisheye is 5mm, the Canon RF 50mm f/1.2 L USM is 50mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF 5.2mm f/2.8 L Dual Fisheye for wide-angle, the Canon RF 50mm f/1.2 L USM for short-telephoto / portrait.
Choose the Canon RF 5.2mm f/2.8 L Dual Fisheye if…
- ✓You shoot wide — it starts at 5mm vs 50mm for landscapes, interiors and architecture.
- ✓You value portability — at 395g (13.9 oz) it's lighter than the 950g (2.09 lb) alternative for travel and all-day carry.
Choose the Canon RF 50mm f/1.2 L USM if…
- ✓You want more light and background blur — f/1.2 is faster than f/2.8, better for low light and subject separation.
- ✓You need more reach — it goes to 50mm vs 5mm for distant subjects, wildlife and sport.
- ✓You like close-focus work — 0.19x magnification vs 0.03x.
Where they differ
- ›Aperture: the Canon RF 50mm f/1.2 L USM opens to f/1.2 vs the Canon RF 5.2mm f/2.8 L Dual Fisheye's f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Canon RF 5.2mm f/2.8 L Dual Fisheye is 5mm, Canon RF 50mm f/1.2 L USM is 50mm — different framing and reach.
- ›Price: the Canon RF 5.2mm f/2.8 L Dual Fisheye is $2,099, $200 under the Canon RF 50mm f/1.2 L USM.
- ›Weight: the Canon RF 5.2mm f/2.8 L Dual Fisheye is 395g (13.9 oz) vs 950g (2.09 lb) — you'll feel the difference handheld.
Frequently asked
Is the Canon RF 5.2mm f/2.8 L Dual Fisheye or the Canon RF 50mm f/1.2 L USM better?
These cover different focal lengths — the Canon RF 5.2mm f/2.8 L Dual Fisheye is 5mm, the Canon RF 50mm f/1.2 L USM is 50mm — so they're not really substitutes. Pick by the field of view you actually need: the Canon RF 5.2mm f/2.8 L Dual Fisheye for wide-angle, the Canon RF 50mm f/1.2 L USM for short-telephoto / portrait.
Who should choose the Canon RF 5.2mm f/2.8 L Dual Fisheye?
Choose the Canon RF 5.2mm f/2.8 L Dual Fisheye if you shoot wide — it starts at 5mm vs 50mm for landscapes, interiors and architecture. Choose it if you value portability — at 395g (13.9 oz) it's lighter than the 950g (2.09 lb) alternative for travel and all-day carry.
Who should choose the Canon RF 50mm f/1.2 L USM?
Choose the Canon RF 50mm f/1.2 L USM if you want more light and background blur — f/1.2 is faster than f/2.8, better for low light and subject separation. Choose it if you need more reach — it goes to 50mm vs 5mm for distant subjects, wildlife and sport. Choose it if you like close-focus work — 0.19x magnification vs 0.03x.
What is the main difference between the Canon RF 5.2mm f/2.8 L Dual Fisheye and the Canon RF 50mm f/1.2 L USM?
Aperture: the Canon RF 50mm f/1.2 L USM opens to f/1.2 vs the Canon RF 5.2mm f/2.8 L Dual Fisheye's f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 5mm | 50mm |
| Lens Type | Prime | Prime |
| Optical Elements | 10 | 15 |
| Optical Groups | 7 | 9 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/1.2 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 6 | 10 |
| Rounded Aperture | No | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 154° | 46° – 46° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | Nano USM | Ring USM |
| Focus Limiter | No | No |
| AF/MF Switch | No | Yes |
| Min Focus Distance | 13 cm | 40 cm |
| Max Magnification | 0.03x | 0.19x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $2,099 | $2,299 |
| Filter Size | − | 77mm |
| Diameter | 92.1mm | 89.8mm |
| Length | 63.2mm | 108mm |
| Weight | 395g (13.9 oz) | 950g (2.09 lb) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
