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NiSi M1 Adapter Ring is the solution
NiSi M1 Adapter Ring is the solution for every filter user. NiSi M1 Adapter Ring helps all lens in different size to be able to attach NiSi M1 Filter Holder 70mm.
NiSi 70mm SYSTEM FILTER HOLDER &
NiSi 70mm SYSTEM FILTER HOLDER & ADAPTER RING, for 37mm - 58mm lens (mirrorless)