NiSi Sigma 12-24mm f/4 HSM ART Series Adapter for NiSi 180mm Filter Holder
- To be used together with the 80mm system Canon 11-24 filter holder
- No vignetting when used with 180mm filters
- High-quality aircraft aluminum
- Very precise CNC machining
- Black matte finish
- Anti-reflection structure
- Nisi 180mm System Holder for the Canon 11-24mm 4.0L is sold separately