These are the full lens specs of the Loxia 50mm:
Planar® with 6 lens elements in 4 groups
Focal length 50 mm
Aperture range f/2.0–f/22
Elements/groups 6/4
Focusing range m/ft 0.45–∞/1.48–∞
Field angle* (diag./horiz./vert.) 46.78°/39.38°/26.70°
Coverage** mm/inch 255.1 x 168.3/10.04 x 6.63