HAIDA Square Filter System M15 Series Adapter Ring for Sigma 14-24mm F/2.8 DG DN Art Lens, Sony E, Leica L Lens, Dedicated Square Filter [Domestic Genuine Product] HD4562 Unused Haida M15 Series Adapter Ring for Sigma 14-24mm F/2.8 DG DN Art Lens, Sony E, Leica L A universal adapter ring by aperture for the new M15 series filter holder system, meeting the needs of landscape photographers from enthusiasts to high-end professionals. By attaching the adapter ring to the lens's filter mounting thread beforehand, the M15 filter holder can be attached with a single touch. *This product is only the Haida M15 series adapter ring. A separate filter holder and square filter are required for use. [Package Contents] Zippered vinyl bag: 1, Filter adapter ring: 1 07