Lens Comparison
Sigma 17mm f/4 DG DN Contemporary (L-mount) vs Sigma 20mm f/2 DG DN Contemporary (L-mount)
Key Differences
- Sigma 20mm f/2 DG DN Contemporary (L-mount) has a better maximum aperture (f/2 vs f/4).
- Sigma 17mm f/4 DG DN Contemporary (L-mount) has a better min focus distance (13 cm vs 22 cm).
- Sigma 17mm f/4 DG DN Contemporary (L-mount) has a better weight (225g (7.9 oz) vs 370g (13.1 oz)).
- Sigma 17mm f/4 DG DN Contemporary (L-mount) has a better length (61.4mm vs 90.5mm).
- Sigma 17mm f/4 DG DN Contemporary (L-mount) has a better max magnification (0.5x vs 0.19x).
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 17mm | 20mm |
| Lens Type | Prime | Prime |
| Optical Elements | 10 | 13 |
| Optical Groups | 8 | 11 |
| Aperture & Iris | ||
| Maximum Aperture | f/4 | f/2 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | L-Mount | L-Mount |
| Angle of View | − | − |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | HLA |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 13 cm | 22 cm |
| Max Magnification | 0.5x | 0.19x |
| 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 | $549 |
| Filter Size | 55mm | 67mm |
| Diameter | 62mm | 74.8mm |
| Length | 61.4mm | 90.5mm |
| Weight | 225g (7.9 oz) | 370g (13.1 oz) |
| Weather Sealed | No | Yes |
| Tripod Collar | No | No |
