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The 35mm f/1.4 DG DN from Sigma is an Art-series prime characterized by its advanced and updated optical design, sleek profile, and bright design. The f/1.4 maximum aperture enables working in low-light conditions and also provides increased control over the depth of field for achieving shallow depth of field effects. The optical layout incorporates two SLD Special-Low Dispersion, one ELD Extra-Low Dispersion, and one FLD Low Dispersion element. It also incorporates two aspherical elements and high refractive index elements to achieve a notable degree of clarity and sharpness with well-controlled distortion and aberrations. For autofocus, a stepping motor is used that maintains a lightweight and compact design while promoting fast and near-silent focusing performance for both stills and video applications. The wide-angle lens is designed for full-frame Sony E-mount mirrorless cameras but can also be used with APS-C models where it provides a 52.5mm equivalent focal length. A Super Multi-Layer Coating has been applied to lens elements in order to minimize lens flare and ghosting and contribute to producing contrast-rich and color-neutral imagery, even in backlit conditions. Resistance coating allows oil and water to be easily wiped from the front lens surface and prevents oil and fat from sticking for easy cleaning. The manual aperture ring can be de-clicked for smooth, silent aperture switching to benefit video applications. Additionally, a dedicated aperture ring lock switch can also be employed to prevent accidental shifting of the aperture setting. A rounded eleven-blade diaphragm contributes to a smooth and pleasing bokeh quality.