This is a SIGMA-made lens that has a maximum focal length of 30 mm and a minimum focusing distance of 0.3 m. The lens has a maximum ƒ/1.4 aperture and a minimum ƒ/16.
From London Camera Exchange
Sigma 30mm F1.4 DC DN Contemporary - For Sony E
TechintheBasket
Sigma 30mm f/1.4 DC DN Contemporary Lens for Sony E
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