Samyang 300mm F6.3 UMC CS is a compact reflex mirror lens suitable for wildlife and landscape photography and astrophotography. It is available for both DSLR and mirrorless cameras with APS-C sensors. The lens for DSLR cameras works with Canon EOS, Nikon, Sony A while the lens for mirrorless cameras works for Sony E, Fujifilm X, MFT and Canon M. For DSLR, the optical construction features 8 lenses in 8 groups and for mirrorless, 9 lenses in 9 groups providing exceptional image quality and contrast by reducing color aberration. Ultra Multi Coating (UMC) helps reducing ghosting and flare as much as possible.