The Sigma 56mm f1.4 DC DN Contemporary Lens for L-Mount is designed for use with APS-C-format L-mount mirrorless cameras. The lens is characterized by its bright f/1.4 maximum aperture, which suits working in difficult lighting conditions and also offers improved control over depth of field for isolating subjects and working with selective focus techniques.
The optical design utilizes two aspherical elements and one SLD element, which help to reduce both spherical and chromatic aberrations for greater sharpness and clarity. A Super Multi-Layer Coating has also been applied to suppress flare and ghosting in order to achieve more contrast and colour accuracy when working in strong lighting conditions. Complementing the optics is a stepping AF motor, which suits both photo and video applications due to its quick, precise, and near-silent performance.
To achieve such a compact construction, lens design is considered based on the capabilities of the camera body function to correct* peripheral light amount and distortion. Moreover, axial colour aberration, which is difficult to eliminate by image processing, is efficiently corrected by incorporating an SLD glass element.
From an early stage in the lens design process, flare and ghosting have been measured to establish an optical design resistant to strong incident light sources such as backlighting. SIGMA’s Super Multi-Layer Coating reduces flare and ghosting to help photographers produce sharp and high contrast images even in backlit conditions. The included lens hood can be attached to block out extraneous light, which can have a negative effect on rendering performance.
The 9-blade rounded diaphragm creates an attractive blur in the out-of-focus areas of the image.
While retaining the compact, lightweight, and outstanding image quality concepts of the Contemporary line, thanks to SIGMA’s leading-edge technology, this lens provides the amount of bokeh and admirable brightness expected from F1.4 lenses even in the mid-tele range. This addition completes the large aperture series comprised of portable wide-angle, standard, and telephoto lenses.
The combination of optical design for video AF and use of the stepping motor enables smooth and quiet autofocus. This lens is also compatible with the Sony E-mount Fast Hybrid AF, achieving precise AF tracking. By using the face recognition or eye AF functions of cameras, focus will continuously be on the face or the eye even if the subject moves during the shoot.
The brass mount combines high precision with rugged construction. Its treated surfaces and enhanced strength contribute to the exceptional durability of the lens. It also features a special sealing to make the lens an excellent choice in a wide variety of conditions.
|Focal Length||56mm (35mm Equivalent Focal Length: 84mm)|
|Lens Mount||Leica L|
|Angle of View||28.5°|
|Minimum Focus Distance||1.64' / 50 cm|
|Optical Design||10 Elements in 6 Groups|
|Diaphragm Blades||9, Rounded|
|Filter Size||55 mm (Front)|
|Dimensions (ø x L)||2.62 x 2.34" / 66.5 x 59.5 mm|
|Weight||9.88 oz / 280 g|