This is a SIGMA-made lens that has a maximum focal length of 24 mm and a minimum focusing distance of 0.28 m. It is not a prime lens, but rather a zoom lens.
From London Camera Exchange
Sigma 14-24mm F2.8 DG DN Art - For L-Mount
Camera Centre
Sigma 14-24mm f2.8 DG DN Art Lens - L-Mount - A GRADE
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