This particular lens has a maximum focal length of 100 mm and a minimum focusing distance of 0.307 m. The lens has a maximum ƒ/3.1 aperture and a minimum ƒ/32.
From Amazon
Samyang Lens for Sony E 100mm Macro T3.1 VDSLR Black
DigiBroadcast
Samyang 7857 100mm MAC T3.1 VDSLR ED UMC Macro Lens - Sony E Fit