FotodioX WonderPana 145 System Holder for Sigma 12-24mm f/4.5-5.6 EX DG ASP HSM II Lens

The WonderPana 145 System from Fotodiox allows you to attach various filters to the Sigma 12-24mm f/4.5-5.6 EX DG ASP HSM II lens. The filter holder accepts all 145mm Fotodiox filters including UV, circular polarizer and neutral density filters. The core unit also doubles as a metal hood, protecting the front element of your lens. A snap-on lens cap is included and fits onto the metal core unit.