Lens Comparison
Sigma 20mm f/2 DG DN Contemporary vs Sony FE 40mm f/2.5 G
Key Differences
- Sony FE 40mm f/2.5 G has a better weight (173g (6.1 oz) vs 370g (13.1 oz)).
- Sony FE 40mm f/2.5 G has a better length (45.5mm vs 90.5mm).
- Sigma 20mm f/2 DG DN Contemporary has a better maximum aperture (f/2 vs f/2.5).
- Sigma 20mm f/2 DG DN Contemporary has a better min focus distance (22 cm vs 25 cm).
- Sigma 20mm f/2 DG DN Contemporary has a better price (msrp) ($549 vs $599).
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 20mm | 40mm |
| Lens Type | Prime | Prime |
| Optical Elements | 13 | 8 |
| Optical Groups | 11 | 7 |
| Aperture & Iris | ||
| Maximum Aperture | f/2 | f/2.5 |
| 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 | − | − |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | XD Linear |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 22 cm | 25 cm |
| Max Magnification | 0.19x | 0.23x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | Yes |
| Declickable Aperture | Yes | Yes |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $549 | $599 |
| Filter Size | 67mm | 49mm |
| Diameter | 74.8mm | 68mm |
| Length | 90.5mm | 45.5mm |
| Weight | 370g (13.1 oz) | 173g (6.1 oz) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
