Converts the bayonet mount of reverse-mounted lenses to the 52mm thread used forfilters and hoods
Simply turn the rotating ring on the holder to find the most effective position.
Increases contrast equally well with black & white film.
Designed for use with telephoto lenses that provide a slip-in filter holder, these filters reduce glare from non-metallic surfaces such as glass and water.
These filters do not affect autofocus or auto exposure operation..
Light rays which are reflected become polarized. Polarizing filters are used to select which light rays enter your camera lens. They can remove unwanted reflections from non-metallic surfaces such as water or glass and also saturate colors providing better contrast. The effect can be seen through the viewfinder and changed by rotating the filter. The filter factor varies according to how the filter is rotated and its orientation to the sun. Filter factor is between 2.3 and 2.8 (approx. +1.3 stops). This is a drop-in circular polarizing filter for the Nikon 200mm f/2.0G AF-SÂ VR lens. This filter is externally rotatable. Circular polarizers are specifically designed for use with auto-focus SLR cameras (They will also work on manual systems without problems).