Adapter ring 77 mm to use the HOYA SQ100 square filter system with 77 mm filter thread lens.
How to use?
First, check the size of the filter diameter of your lens. The size is usually written on the back side of the lens cap, but can also be found in the manual of your lens.
After acquiring the corresponding adapter ring, attach the 86mm-86mm geared adapter (included in the SQ100 Holder Kit) to the holder. Then, attach the adapter ring to the geared adapter. Now you can successfully attach the holder to your lens.