AstrHori 6 mm f/2.8 Fisheye § 03 Head to head
AstrHori 6 mm f/2.8 Fisheye vs Canon RF 5.2 mm f/2.8L Dual Fisheye
AstrHori 6mm f/2.8 has a longer reach. Canon 5.2mm f/2.8 has a wider field of view.
The AstrHori 6 mm f/2.8 Fisheye is a 6mm f/2.8 prime, and the Canon RF 5.2 mm f/2.8L Dual Fisheye is a 5.2mm f/2.8 prime. On paper the AstrHori 6 mm f/2.8 Fisheye comes out ahead, 5 advantages to 1, but which one suits you depends on what you shoot.
AstrHori 6 mm f/2.8 Fisheye 
Canon RF 5.2 mm f/2.8L Dual Fisheye 01
Key differences
Why is the AstrHori 6 mm f/2.8 Fisheye better than the Canon RF 5.2 mm f/2.8L Dual Fisheye?
- Longer reach (6mm vs 5.2mm)
- 56 mm shorter (64.8 mm vs 121.1 mm long)
- Focuses 12 cm closer (0.08 m vs 0.2 m)
- More aperture blades (8 vs 7)
- Newer design (2025 vs 2021)
Why is the Canon RF 5.2 mm f/2.8L Dual Fisheye better than the AstrHori 6 mm f/2.8 Fisheye?
- Wider field of view (5.2mm vs 6mm)
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Which should you buy?
- landscape For landscape photography, the Canon RF 5.2 mm f/2.8L Dual Fisheye has the edge: it goes wider, to 5.2mm against 6mm.
- architecture For architecture, the Canon RF 5.2 mm f/2.8L Dual Fisheye has the edge: it goes wider, to 5.2mm against 6mm.
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Specification
| Specification | AstrHori 6 mm f/2.8 Fisheye | Canon RF 5.2 mm f/2.8L Dual Fisheye |
|---|---|---|
| Focal length | 6mm | 5.2mm |
| Maximum aperture | f/2.8 | f/2.8 |
| Minimum aperture | f/16 | f/16 |
| Lens type | Prime lens | Fisheye |
| Format | Full frame | Full frame |
| Weight | 340 g ◆ | 350 g |
| Dimensions | 61 x 64.8 mm | 121.1 x 53.5 mm |
| Minimum focusing distance | 0.08 m ◆ | 0.2 m |
| Image stabilization | No | No |
| Weather sealing | — | Yes |
| Aperture ring | No | No |
| Aperture blades | 8 ◆ | 7 |
| Optical construction | 10 elements / 8 groups | 12 elements / 10 groups |
| Lens mount | Sony E, Nikon Z, Canon RF, L-Mount | Canon RF |
| Released | 2025 | 2021 |
| Price | $299 launch price | — |
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Size
- A · AstrHori
- B · Canon
- 64.8 × 61 mm
- 121.1 × 53.5 mm
The Canon RF 5.2 mm f/2.8L Dual Fisheye is 56 mm longer and 10 g heavier than the AstrHori 6 mm f/2.8 Fisheye.
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Video reviews
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Questions
- Which is lighter, the AstrHori 6 mm f/2.8 Fisheye or the Canon RF 5.2 mm f/2.8L Dual Fisheye?
- The AstrHori 6 mm f/2.8 Fisheye weighs 340 g, 10 g less than the Canon RF 5.2 mm f/2.8L Dual Fisheye (350 g).
- Which focuses closer, the AstrHori 6 mm f/2.8 Fisheye or the Canon RF 5.2 mm f/2.8L Dual Fisheye?
- The AstrHori 6 mm f/2.8 Fisheye focuses down to 0.08 m, against 0.2 m for the Canon RF 5.2 mm f/2.8L Dual Fisheye.
- Do the AstrHori 6 mm f/2.8 Fisheye and the Canon RF 5.2 mm f/2.8L Dual Fisheye have image stabilization?
- No, neither lens has optical image stabilization; rely on in-body stabilization if your camera has it.
- Is the AstrHori 6 mm f/2.8 Fisheye or the Canon RF 5.2 mm f/2.8L Dual Fisheye better for landscape photography?
- For landscape photography, the Canon RF 5.2 mm f/2.8L Dual Fisheye has the edge: it goes wider, to 5.2mm against 6mm.
- Is the AstrHori 6 mm f/2.8 Fisheye or the Canon RF 5.2 mm f/2.8L Dual Fisheye better for architecture?
- For architecture, the Canon RF 5.2 mm f/2.8L Dual Fisheye has the edge: it goes wider, to 5.2mm against 6mm.
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