Specification Brand : SKYZHENG BulletPoint1 : 【1】52mm to 42mm Step-Down Ring Filter Adapter BulletPoint2 : 【2】Made of high-quality anodized aluminum,the ring has a strict surface treatment to avoid shaking or cross threading, and the ultra-thin design makes it durable and practical. BulletPoint3 : 【3】Compatibility: Compatible with all 52mm camera lenses & 42mm accessories. BulletPoint4 : 【4】How do I find my filter thread size? Your lens thread size will be printed underneath your lens cap or written somewhere on the lens barrel. Please do make sure to order the correct size otherwise it will not fit on your camera lens. BulletPoint5 : 【5】30-day quality assurance, worry-free returns and exchanges, please contact us if you have any questions! Color : 52mm to 42mm ExternallyAssignedProductIdentifier1 : 783103817286 ExternallyAssignedProductIdentifier2 : 0783103817286 ExternallyAssignedProductIdentifier3 : 00812759016757 FocusType : Manual Focus IncludedComponents : No components ItemName : 52mm to 42mm Step Down Ring Filter Adapter Metal Ring Step Down Rings Adapter Filter Compatible with All 42mm UV,CPL,ND,Lens Hood,Threaded Lens ect (52mm to 42mm) ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 3.14 inches ItemPackageDimensions_Width : 3.14 inches ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-filter-step-down-rings Manufacturer : SKYZHENG MaxFocalLength : 35 millimeters MinFocalLength : 35 millimeters ModelNumber : SKY240109 NumberOfItems : 1 PartNumber : SKY240109 ProductDescription : Step-Down Ring Step-up Ring Filter Adapter ,for All Brands UV ND CPL, Metal Ring ProductSiteLaunchDate : 2024-01-10T00:40:24.508Z Size : 27mm-49mm Style : Adapter SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 WarrantyDescription : 30 day refundable and exchangeable ZoomType : Fixed