Sigma 20mm f/1.4 DG HSM Art lens: first sample photos and reviews
The German website d-pixx posted the first sample pictures taken with the new Sigma 20mm f/1.4 DG HSM Art lens that is scheduled to start shipping this month in the US (November 15ht according to Adorama).
Sigma 20mm f/1.4 DG HSM Art lens additional information:
Specifications
| Lens construction | 15 elements in 11 groups |
| Minimum aperture | F16 |
| Angle of view (35mm equivalent) | 94.5° |
| Minimum focusing distance | 27.6 cm / 10.9 in. |
| Dimensions (diameter x length) | φ90.7mm x 129.8mm / 3.6 in. x 5.1 in. |
| Number of diaphragm blades | 9 (rounded diaphragm) |
| Maximum magnification ratio | 1：7.1 |
| Weight | 950 g / 33.5 oz. |
Features
- A Hyper Sonic Motor (HSM) that ensures a silent, high-speed AF function. Smoother AF is achieved when the this AF algorithm is optimized
- A nine-blade, rounded diaphragm creates an attractive blur to the out-of-focus areas of the image
- A brass bayonet mount of highly precise and durable construction to enhance mount’s strength and long-term wear resistance
MTF charts
Lens design
Chromatic aberration
Vignetting
Distortion
Pros and cons of the Sigma 20mm f/1.4 DG HSM Art lens from Lenstip:
Pros:
- unique parameters,
- solid and stylish casing,
- brilliant image quality in the frame centre,
- excellent resolution on the edge of the APS-C/DX,
- acceptable image quality on the edge of full frame,
- slight lateral chromatic aberration,
- sensible correction of spherical aberration,
- lack of serious distortion problems,
- slight vignetting on the APS-C/DX sensor,
- silent and quick autofocus,
- excellent parameters/price and performance/price index.
Cons:
- noticeable coma,
- very high vignetting on full frame,
- work against bright light could have been better.