NiSi Adapter Ring for Sigma 12-24/4

NiSi Adapter Ring for Sigma 12-24/4 HSM ART – Enables use of 180mm square filters, vignetting-free at 12mm

This NiSi adapter ring lets you fit the NiSi 180mm filter system to the Sigma 12-24mm f/4 HSM ART lens. It works together with the 180mm system Canon 11-24 filter holder and 180mm square filters. Importantly, the adapter provides vignetting-free performance even at 12mm.

Key features

• CNC machined from a single block of aviation-grade aluminum.
• Matte black frosted finish on the surface for reduced reflections.
• Includes a gasket to prevent any light leaking.
• Designed for use with the 180mm system holder and 180mm square filters.
• Vignetting free even at 12mm when used with the stated holder and filters.

Compatibility and intended use

Use this adapter ring specifically with the Sigma 12-24/4 HSM ART lens. It is made to interface with the NiSi 180mm system when combined with the Canon 11-24mm 4.0L 180mm system holder and 180mm square filters. In this configuration, the setup remains vignetting-free down to 12mm.

Important note

Note! The 180mm System Holder for the Canon 11-24mm 4.0L is sold separately and is not included with this adapter ring. You must have the 180mm system holder and the 180mm square filters to complete the filter system.

Specifications

FAQ

Question: Will this adapter ring alone allow me to use 180mm square filters on the Sigma 12-24/4 HSM ART?
Answer: The adapter ring is required, but you also need the 180mm system holder and 180mm square filters. The 180mm System Holder for the Canon 11-24mm 4.0L is sold separately and is not included.

Question: Does the adapter cause vignetting at the widest angle of 12mm?
Answer: When used with the specified 180mm holder and 180mm square filters, the adapter provides vignetting-free performance even at 12mm.

Question: What materials and manufacturing methods are used for the adapter?
Answer: NiSi CNC machines the adapter from a single block of aviation-grade aluminum and applies a matte black frosted finish. The design also includes a gasket to prevent light leaks.

Question: Is the 180mm holder included with this adapter ring?
Answer: No. The 180mm system holder for the Canon 11-24mm 4.0L is sold separately and must be purchased to use 180mm square filters with this adapter.