Samyang SYXP50 C XP 50mm f/1.2 High Speed Lens for Canon EF with Built in AE Chip, Black

Aperture range of F1.2 to 16 and constructed of 11Glass elements in 8 groups Enhanced ultra Multi-Coating (UMC); manual focus Lens with built-in AE Chip for auto metering and auto exposure with your camera Features 9 diaphragm blades; minimum focusing distance of 17.7 inches