Adaptor rings fit into the lens to accommodate the filter holder. Once the adaptor is in place the filter holder clips firmly to it using a smooth, quick-release, spring-loaded mechanism.
Sturdily constructed with an aluminum screw thread, the adaptors are available in both standard and wide-angle configurations. Special sizes can be made to order.
The adaptors are designed so that the filter is placed as close as possible to the front element of the camera lens, and should be used to prevent vignetting with wide angle lenses.
Reviewed by 1 customers
i strugled with cokin holders for years finally gave up and purchased lee foundation kit 95mm,adapter ring also 72,77 ring also you just hang it off the top and pull it down waith the release handle and you are done awsome landscape tool because it fits any lens 100mm or less