Sigma officially announced their 20mm f/1.4 DG HSM Art lens for Nikon F-mount – the fastest 20mm lens available today (or the world’s first 20mm f/1.4 lens). The US price is $899 and pre-orders are now open at B&H and Adorama. Shipping will start at the beginning of November, 2015. Additional technical 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 chart:
Lens design:
Chromatic aberration:
Vignetting:
Distortion:
The full press release can be found here.
