All Metal Body: Made of 5052 aviation aluminum, light weight and portable
Optimized Optical Design: 7 groups of 10 elements, 2 high-refractive elements and 2 ED elements
F1.8 Large Aperture: Performing excellently in low-light environments while creating soft background bokeh
Fast and Accurate Autofocus: Featuring an STM and lead screw-type stepping motor, this lens supports autofocus recognition for eyes, animals, and cars
Firmware Upgrade Interface/0.4mm Minimum Focus Distance/Eye’s Field Focal Length