Sigma 20mm f/2 DG DN Contemporary vs Sony FE 85mm f/1.8
The bottom line
These cover different focal lengths — the Sigma 20mm f/2 DG DN Contemporary is 20mm, the Sony FE 85mm f/1.8 is 85mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 20mm f/2 DG DN Contemporary for wide-angle, the Sony FE 85mm f/1.8 for short-telephoto / portrait.
Choose the Sigma 20mm f/2 DG DN Contemporary if…
- ✓You shoot wide — it starts at 20mm vs 85mm for landscapes, interiors and architecture.
- ✓You like close-focus work — 0.19x magnification vs 0.13x.
Choose the Sony FE 85mm f/1.8 if…
- ✓You need more reach — it goes to 85mm vs 20mm for distant subjects, wildlife and sport.
Where they differ
- ›Aperture: the Sony FE 85mm f/1.8 opens to f/1.8 vs the Sigma 20mm f/2 DG DN Contemporary's f/2 — more light and shallower depth-of-field.
- ›Focal range: Sigma 20mm f/2 DG DN Contemporary is 20mm, Sony FE 85mm f/1.8 is 85mm — different framing and reach.
Frequently asked
Is the Sigma 20mm f/2 DG DN Contemporary or the Sony FE 85mm f/1.8 better?
These cover different focal lengths — the Sigma 20mm f/2 DG DN Contemporary is 20mm, the Sony FE 85mm f/1.8 is 85mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 20mm f/2 DG DN Contemporary for wide-angle, the Sony FE 85mm f/1.8 for short-telephoto / portrait.
Who should choose the Sigma 20mm f/2 DG DN Contemporary?
Choose the Sigma 20mm f/2 DG DN Contemporary if you shoot wide — it starts at 20mm vs 85mm for landscapes, interiors and architecture. Choose it if you like close-focus work — 0.19x magnification vs 0.13x.
Who should choose the Sony FE 85mm f/1.8?
Choose the Sony FE 85mm f/1.8 if you need more reach — it goes to 85mm vs 20mm for distant subjects, wildlife and sport.
What is the main difference between the Sigma 20mm f/2 DG DN Contemporary and the Sony FE 85mm f/1.8?
Aperture: the Sony FE 85mm f/1.8 opens to f/1.8 vs the Sigma 20mm f/2 DG DN Contemporary's f/2 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 20mm | 85mm |
| Lens Type | Prime | Prime |
| Optical Elements | 13 | 9 |
| Optical Groups | 11 | 8 |
| Aperture & Iris | ||
| Maximum Aperture | f/2 | f/1.8 |
| Minimum Aperture | f/16 | f/22 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 94° | 29° – 29° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | DDSSM |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 22 cm | 80 cm |
| Max Magnification | 0.19x | 0.13x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | No |
| Declickable Aperture | Yes | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $549 | $599 |
| Filter Size | 67mm | 67mm |
| Diameter | 74.8mm | 78mm |
| Length | 90.5mm | 82mm |
| Weight | 370g (13.1 oz) | 371g (13.1 oz) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
