This is a Sony lens that has a maximum focal length of 50 mm and a minimum focusing distance of 0.45 m. The aperture of the lens is minimum ƒ/22 and maximum ƒ/1.8.
From London Camera Exchange
Sony FE 50mm f/1.8 Lens
Camera Centre
Sony FE 50mm f1.8 Full Frame E-mount Lens
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