This 85mm Aluminum Modular Filter Holder Kit with 77mm Adapter Ring from Formatt Hitech provides the necessary items to allow a lens with 77mm front filter threads to use Formatt Hitech filters up to 85mm wide.
The Hitech 85mm Aluminum Modular Filter Holder is a system that will permit you to use numerous filters depending on your needs in order to create the shot you envision. It comes fully assembled to accept three 85mm-wide filters, but can be modified to accommodate more or less filters.
This holder is constructed from aluminum alloy for increased stability while still remaining lightweight. A front screw adapter ring is required for attachment directly to the front of the lens.
You can also modify the number of filter slots with your holder; once you decide upon the number of desired slots, included brass nuts can be used to secure everything in place. Additional spacers and screws are also available to further expand the system.
The Formatt Hitech 77mm Adapter Ring for 85mm Aluminum Modular Filter Holder allows that holder to connect to a lens with 77mm front filter threads.