The filter holder can be set up to hold two filters, and will produce a slight vignette at <13mm.
The kit consists of three main components, a front filter holder, a filter holder adapter ring, and an adapter ring lens collar. Use of the filter holder is easily accomplished by first sliding the filter holder adapter ring over the rear of a Sigma 12-24mm f/4 DG HSM Art lens until it has achieved a secure fit. Afterwards, the adapter ring lens collar can also be slid over the rear of the lens. The adapter ring lens collar can then be screwed into the adapter ring to lock both components into place.
This Holder is compatible with Lee SW150 Filters, Haida 150mm Filters, and many other 2mm thick 150mm filters.