... extending and shading the end of the lens. Another benefit of the lens' extension is some additional protection from accidental impact. ... folds down and can remain on the lens permanently because it only lengthens the lens minutely in its collapsed state, requiring hardly ... threaded to accept filters.Size: 49mm,52mm,55mm,58mm,62mm,67mm,72mm,77mm,82mm rubber lens hood 49mm,52mm,55mm,58mm,62mm,67mm,72mm ...