The Sigma 35mm f/1.4 DG HSM Art Lens is a new wide-angle lens designed for artistic photography and reportage photography in low light conditions. In a short period from the date of the announcement in January 2013, he managed to receive the TIPA 2013, Camera Grand Prix Japan 2013 awards, as well as the gold medal of the dpreview.com resource and many recommendations from other specialized sites. The test results are really impressive: the lens provides a very high resolution even at fully open aperture, the level of linear distortions is extremely low (in the region of 0.5 - 0.9%), chromatic aberrations, astigmatism, and field curvature are also excellently corrected.
For a fixed focal length lens, the Sigma AF 35mm f / 1.4 DG HSM A has a very complex optical design: as many as 13 elements are installed in its body in 11 groups, of which 2 are aspherical, 4 are SLDs with low dispersion , and 1 FLD - from "fluorite-like" low dispersed glass. All elements are multi-coated to minimize flare and ghosting when shooting against light. The diaphragm consists of 9 rounded blades for a pleasing bokeh effect. The ultrasonic HSM motor guarantees very fast and virtually silent focusing.
The transition to a new concept of the company's development was expressed in the appearance of the optics: a matte black surface of the body with a wide rubberized focusing ring and a small distance scale. Of the materials, metal and heat-stable composite materials are used (in other words, a special type of plastic that does not expand when heated). According to the manufacturer's description, the lens "is designed primarily to meet the expectations of those users who value creative, impressive performance over compactness and versatility." The lens is actually not an easy one, 665, i.e. it weighs more than an entry-level DSLR. In general, the lens can be recommended for both 35mm and half-frame cameras. When used with an APS-C sensor, the angle of view is approximately the same as a classic 50mm lens on a film camera. The price is quite high, and yet the Sigma AF 35mm f / 1.4 DG HSM A costs less than similar lenses from major brands. And this despite the fact that it even slightly surpasses them in image quality. The Sigma AF 35mm f / 1.4 DG HSM A will not disappoint even the most demanding photographers.