LEE Filters 105mm Front Accessory Ring
The Lee 105mm front accessory ring enables the use of a 105mm circular polarizer. The front accessory ring mounts to the front of the Lee FK holder with the same brass screws that secure the filter guides to the holder. Depending on the number of filter guides (slots) you have on the holder, you may need longer screws (sold separately) to add this front accessory ring. The only purpose of this ring is to provide 105mm diameter threading for the attachment of a 105mm circular polarizer.