Sigma presents the lightest lens in its class with the new 50mm F1.2 DG DN | Art - the full-frame lens combines a high speed of F1.2 with a compact and lightweight body. In order to achieve the low weight of 745g (L-mount), Sigma has focused on several aspects of production.
SIGMA 50mm F1.2 DG DN - Art
The optical design (17 elements in 12 groups) and the mechanical construction of the standard focal length have been concentrated on the essentials. Each of the glass elements used in the SIGMA 50mm F1.2 DG DN | Art is ground as thin as possible, using glass with a high refractive index and four aspherical lenses. Any form of aberration should be completely suppressed even when the aperture is open, so that all details are reproduced without color gradients. The clickable aperture is made up of 13 blades.
The built-in floating focus system is designed to ensure high autofocus performance even in video mode while simultaneously reducing the overall length, resulting in a compact lens (81.0mm × 108.8mm). A newly developed dual HLA drive (High-Response Linear Actuator) is used - each of the two focus groups uses an improved HLA drive, which is characterized by a smaller volume with high and precise thrust force and minimal noise. The fact that two focus groups move in opposite directions significantly reduces the path required by the individual focus unit.
Focus breathing should be largely prevented. The close focus limit is 40 cm.
According to Sigma, the use of TSC (Thermally Stable Composite) plastics, a polycarbonate with a thermal expansion rate similar to that of aluminum, has further reduced the weight of the lens without compromising on stability or durability.
A high-quality coating is intended to minimize reflections within the lens and thus also ghosting and aperture spots in order to ensure high contrast in the images.
The dust and splash-proof SIGMA 50mm F1.2 DG DN | Art is available for cameras with L-mount and Sony E-mount and costs 1499 euros. Delivery is scheduled to begin on April 18.
Sigma Germany presents the new lens in detail in the following video:
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