This SZX 400mm f/8 Reflex MF Lens for Canon RF from Tokina is a 400mm super telephoto lens with a catadioptric optical design and a fixed f/8 aperture. It offers a compact alternative to standard telephoto lenses and fits easily in your pocket or a small bag for travel, wildlife, and outdoor photography.

The SZX 400mm f/8 reflex lens features a T-Mount design, making it easily adaptable to a wide variety of camera systems. Included with the lens is an RF-mount adapter.

Manual focus, catadioptric optical design telephoto lens with fixed f/8 aperture, which is compatible with select camera focus peaking systems and in-body multi-axis advanced image stabilization systems.
Multilayered anti-reflection coating for efficient light intake and reduced flare, plus high-reflectivity silvered coating and a protective antioxidant layer on the back side of mirrored surfaces for long performance life.
Minimum focusing distance of 45.3" and magnification 0.4x can capture small objects, while the 400mm focal length reduces the possibility of casting a shadow on the subject
Catadioptric design and construction creates a smooth and unusual donut-shaped bokeh
Wide focus ring provides smooth rotation range of 270°