The Cokin P253 P Series Adapter Ring Cap is a lens cap that fits onto the adapter ring. This means the filter holder can then be changed from one lens to another, with the adapter ring remaining on each lens.
The Cokin P255 P Series Modular Hood is used to eliminate unwanted reflections and glare. It fits onto the filter holder by pressing on the upper and lower parts of the lens hood. Several modular hoods can be attached to each other creating a longer