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The Sigma 30mm f/1.4 DC DN Contemporary is a fast prime for Sony E-mount APS-C cameras, giving a roughly 45mm full-frame-equivalent field of view. Its f/1.4 maximum aperture gathers a lot of light and allows shallow depth of field, which suits available-light shooting, portraits and video. The stepping motor autofocus is quiet and smooth, and the lens is small and light next to full-frame f/1.4 primes. Owners praise sharpness and value but note softness wide open at the edges and some focus breathing and chromatic fringing.
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Reviewers and owners rate it highly as a fast, affordable standard prime for Sony APS-C. They praise center sharpness, the bright aperture and quiet autofocus, while noting soft corners wide open, fringing and some focus breathing.
The Sigma 30mm f/1.4 Contemporary DC DN is a lens for Sony Alpha E-mount cameras. It has a 30mm focal length and a maximum aperture of f/1.4. The bright aperture helps in low light and gives control over depth of field for selective focus work.
The optical design has 9 elements in 7 groups, including two aspherical elements and one high-refractive index element. A super multi-layer coating is applied. The diaphragm has 9 rounded blades. The lens body is made of a thermally stable composite (TSC) material.
A stepping motor drives the autofocus. It is quick, accurate and quiet, which suits both photos and video. The lens has a 50.7° angle of view and focuses as close as 11.81 inches (30 cm), with a maximum magnification of 0.14x.
