Neewer High Definition Multi-coated 500mm f/8 Manual Focus Telephoto Lens for Canon Nikon Olympus Fuji Pentax and Other Digital SLR Cameras by Using T-Mount(T Mount NOT Included)

Auto focus and infrared compatible
It works manually only
A Multi-coated low-dispersion glass capable of producing sharp, high definition images
Designed to maximize day and night shots by providing maximum light and image transmission with minimum distortion, fantastic for all types of photographic situations
f/8, High-index / low-dispersion optical glass, Fully multi-coated, every element, Anti-reflection coating