FotodioX WonderPana 145 Core Unit for Tamron 15-30mm Lens with 145mm Circular Polarizer Filter

This WonderPana 145 Core Unit from FotodioX is designed to specifically fit the Tamron SP 15-30mm f/2.8 Di (VC or non-VC) USD lens, as well as a separately available WonderPana 6.6" Holder Bracket. Those items can be combined to allow for the convenient use of two 2.5 to 4.0mm-thick filters measuring 6.6" wide, or one 2.5 to 4.0mm-thick filter measuring 6.6" wide, along with one FotodioX 145mm round filter behind it. A compatible 145mm circular polarizer filter and a 145mm inner-pinch lens cap for 145mm FotodioX round filters are also provided.