The Foundation Kit takes standard 100mm filters, and can be constructed to take up to three filters at any one time. The Foundation Kit, like all others, clips onto the adaptor ring which, in turn, screws onto your camera's lens.
t the core of the LEE Filters system is the holder, which comes assembled with two filter slots but can easily be adapted to take up to four filters.
The holder is designed to be compatible with 100mm filters – our standard width. To fit the holder to the lens, an adaptor ring is required.
There are two types of LEE Filter adaptor ring:
one for general use, and one for wide-angle lenses.