Step up filter adapters are a good solution for photographers. (. The ..as I), many lenses of different focal lengths possess. Because there are several objective diameter, you would have otherwise always buying these in diameter matching filter .... The adapters are made of solid metal and the front screwed into the lens ... A Step Up Adapter has eg thread size 52 (Lens diameter) on filter size, for example 67mm .. that is the diameter of the filter is screwed forward ... in the thread the adapter.! You then need only the Step Up adapter for each lens diameter ... and thus can use a filter to all optics. This saves a lot of money on expensive special filters. The sun visor can be always put on.! There are step-up adapter in all standard lens sizes ... One can also use Step Down adapter. = Smaller filters to larger lenses. = Is but with caution apply for the evtl.auftr.Schattenbildung the lens.!
