| 摘要 |
PURPOSE:To facilitate make a hood rigid and lightweight and to facilitate its portage and handling by extending a net type plate which is formed by making the set of respective sections of its opaque light shield wall parallel in a ring which can be corrected to the tip of an optical system. CONSTITUTION:The net type plate 2 is extended in the ring 3 which can be connected to the tip of the optical system by screwing, etc., and a set of sections of respective opaque light shield wall 1 of the plate 2 is made parallel. Consequently, halation due to the incidence of the sunshine or illumination light is prevented to make the constitution rigid and lightweight, thereby facilitating the portage and handling.
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