Kata E-704 is a rain hood for the Kata E-702 system, suitable for telephoto lenses of various sizes (up to a 400 mm f/2.8 lens or a 500 mm f/4.0 lens). If you do not have the Kata E-702 camera cover, the E-704 will protect only the lens; to protect the camera, Kata E-702 is required.
The Kata E-704 kit includes two covers for different telephoto lenses (350 mm and 650 mm lengths) and one sleeve for controlling lens focus, which attaches to the protective cover with hook-and-loop fasteners.