This is a Fujifilm lens that has a 0.83-metre minimum focusing distance and a 300 mm maximum focal length. It is not a prime lens, but rather a zoom lens.
From London Camera Exchange
Fujifilm XF 70-300mm F4-5.6 R LM OIS WR Lens
TechintheBasket
Fujifilm XF 70-300mm f/4-5.6 R LM OIS WR Lens