Apart from the Lee Holder, a Lee 100 adapter ring is the next most crucial part of any system. Being part of a modular system. The Lee 100 System allows users to use their filters on a wide range of lenses by merely changing the ring.
The range of adapter rings offered by Lee Filters for the 100 system is extensive. Not only the range of 'standard' rings. Standard rings are suitable for the vast majority of lenses, but there is also the range of 'wide' adapter rings.