Specification Brand : ProMaster BulletPoint : Promaster 55-46mm Step Ring Color : black CompatibleMountings1 : Canon EF CompatibleMountings2 : Canon EOS CustomerPackageType : box ExternallyAssignedProductIdentifier1 : 0029144050054 ExternallyAssignedProductIdentifier2 : 029144050054 FocalLengthDescription : f/2 FocusType : Manual Focus ItemName : Promaster 55-46mm Step Ring ItemPackageDimensions_Height : 0.15 inches ItemPackageDimensions_Length : 5 inches ItemPackageDimensions_Width : 3 inches ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-adapters LensDesign : Prime Manufacturer : Promaster MinFocalLength : 55 millimeters ModelNumber : 5005 MountingType : M42 NumberOfItems : 1 PartNumber : 5005 ProductDescription : PROMASTER Stepping Rings are the perfect addition to your collection of photographic gear. Use them with special effects filters and add on lenses to convert a lens with one thread diameter to a filter or conversion lens with another. PROMASTER Stepping Rings are precision milled and designed to give you years of reliable service. ProductSiteLaunchDate : 2010-02-25T19:00:58-00:00 Style : vintage