This is a SIGMA lens that has a maximum focal length of 400 mm and a minimum focusing distance of 1.6 m. It could be the perfect thing if you're looking for a zoom lens.
From London Camera Exchange
Sigma 100-400mm F5-6.3 DG DN OS Contemporary - L-Mount
Camera Centre
Sigma 100-400mm f5-6.3 C Contemporary DG DN OS Lens - L-Mount