Sigma C 20 mm f/2 DG DN § 03 Head to head
Sigma C 20 mm f/2 DG DN vs Viltrox PFU RBMH 20 mm T2 ASPH
Sigma 20mm f/2 is 438 g lighter. Viltrox 20mm f/2 has a more aperture blades.
The Sigma C 20 mm f/2 DG DN is a 20mm f/2 prime, and the Viltrox PFU RBMH 20 mm T2 ASPH is a 20mm f/2 prime. On paper the Sigma C 20 mm f/2 DG DN comes out ahead, 5 advantages to 1, but which one suits you depends on what you shoot.
Sigma C 20 mm f/2 DG DN 
Viltrox PFU RBMH 20 mm T2 ASPH 01
Key differences
Why is the Sigma C 20 mm f/2 DG DN better than the Viltrox PFU RBMH 20 mm T2 ASPH?
- 438 g lighter (370 g vs 808 g)
- 30 mm shorter (70 mm vs 100 mm long)
- Focuses 3 cm closer (0.22 m vs 0.25 m)
- Smaller filter thread (62 mm vs 82 mm)
- Newer design (2022 vs 2020)
Why is the Viltrox PFU RBMH 20 mm T2 ASPH better than the Sigma C 20 mm f/2 DG DN?
- More aperture blades (14 vs 9)
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Which should you buy?
- landscape For landscape photography, the Sigma C 20 mm f/2 DG DN has the edge: it is 438 g lighter to carry.
- architecture For architecture, the Sigma C 20 mm f/2 DG DN has the edge: it is 438 g lighter to carry.
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Specification
| Specification | Sigma C 20 mm f/2 DG DN | Viltrox PFU RBMH 20 mm T2 ASPH |
|---|---|---|
| Focal length | 20mm | 20mm |
| Maximum aperture | f/2 | f/2 |
| Minimum aperture | f/22 | f/16 |
| Lens type | Prime lens | Prime lens |
| Format | Full frame | Full Frame |
| Weight | 370 g ◆ | 808 g |
| Dimensions | 74.4 x 70 mm | 100 x 80 mm |
| Minimum focusing distance | 0.22 m ◆ | 0.25 m |
| Image stabilization | No | No |
| Aperture ring | No | — |
| Aperture blades | 9 | 14 ◆ |
| Optical construction | 13 elements / 11 groups | 12 elements / 9 groups |
| Filter size | 62 mm ◆ | 82 mm |
| Lens mount | Sony E, L-Mount | L-Mount |
| Released | 2022 | 2020 |
| Price | — | $499 list price |
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Size
- A · Sigma
- B · Viltrox
- 70 × 74.4 mm
- 100 × 80 mm
The Viltrox PFU RBMH 20 mm T2 ASPH is 30 mm longer and 438 g heavier than the Sigma C 20 mm f/2 DG DN.
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Sample frames
Sigma C 20 mm f/2 DG DN
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Video reviews
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Questions
- Which is lighter, the Sigma C 20 mm f/2 DG DN or the Viltrox PFU RBMH 20 mm T2 ASPH?
- The Sigma C 20 mm f/2 DG DN weighs 370 g, 438 g less than the Viltrox PFU RBMH 20 mm T2 ASPH (808 g).
- Which focuses closer, the Sigma C 20 mm f/2 DG DN or the Viltrox PFU RBMH 20 mm T2 ASPH?
- The Sigma C 20 mm f/2 DG DN focuses down to 0.22 m, against 0.25 m for the Viltrox PFU RBMH 20 mm T2 ASPH.
- Do the Sigma C 20 mm f/2 DG DN and the Viltrox PFU RBMH 20 mm T2 ASPH have image stabilization?
- No, neither lens has optical image stabilization; rely on in-body stabilization if your camera has it.
- Is the Sigma C 20 mm f/2 DG DN or the Viltrox PFU RBMH 20 mm T2 ASPH better for landscape photography?
- For landscape photography, the Sigma C 20 mm f/2 DG DN has the edge: it is 438 g lighter to carry.
- Is the Sigma C 20 mm f/2 DG DN or the Viltrox PFU RBMH 20 mm T2 ASPH better for architecture?
- For architecture, the Sigma C 20 mm f/2 DG DN has the edge: it is 438 g lighter to carry.
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