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The Rokinon Reflex 300mm f/6.3 UMC CS Lens is a mirror lens designed specifically for use on APS-C-format Sony A-mount DSLR cameras. The lens' Cassegrain design enables it to achieve a 450mm 35mm-equivalent focal length perspective within a compact and lightweight form factor that is significantly smaller than a traditional 300mm lens. It features a fixed f/6.3 aperture and utilizes manual focus operation for focusing as closely as 3.6'.
The mirror construction of the lens inherently works to reduce chromatic aberrations and a UMC (Ultra Multi Coated) coating has been applied to reduce surface reflections, lens flare, and ghosting while also contributing to improved overall contrast.
Mirror lens designed specifically for APS-C-format Sony A-mount DSLR cameras.
Catadioptric system with Cassegrain design helps to reduce the overall size of the lens while still providing a 35mm-equivalent focal length of 450mm.
A UMC coating has been applied to the lens elements to improve clarity, minimize reflections, and enhance overall image contrast.