The Cokin P255 P-Series Modular Hood is used to eliminate unwanted reflections & glare. It fits onto the filter-holder by pressing
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This Cokin Universal Adapter Ring is designed to attach Cokin's "P" series filter holder to lenses with a non-standard diameters.
It is attached to the outside of the lens & will fit on all lenses under 75 mm (A Series), 84 mm (P Series) or 118 mm (X-PRO Series).