Highlights
-Aluminum-alloy construction
-Holder for filters 150mm-wide,2mm-thick
-Slots for 2 square/rectangular filters
-Build-in circular polarizer
-Thumbwheel for orienting polarizer
-Interchangeable lens adapter
-Includes Canon TS-E 17mm lens adapter
-Screws onto lens,lock for horizon
NiSi also released 82mm adapter ring for Canon TS-E 17mm f/4L
