Kenko 400mm F8 mirror lens hood Canon EF mount for Black 419 656 Incredibly compact Mirror tele lens (Overall Length 82mm) The lens is designed to compact and lightweight for those who need to carry a sub super-telephoto lens and reduce carrying equipments It is possible to shorten the overall length and also it has a lightweight.Silver deposition mirror is adopted The lens has fixed aperture F8 Machined aluminum body Filter size:67mmJapanese Instruction Only