This is a Samyang lens that has a maximum focal length of 8 mm and a minimum focusing distance of 0.3 m. The lens has a maximum ƒ/3.5 aperture and a minimum ƒ/22.
Carmarthen Cameras
Used Samyang 8mm F3.5 UMC CS II Fisheye Lens - Nikon F Fit - (SH42222)