Specification Brand : RageCams BulletPoint1 : 【1】46mm to 43mm Step Down Ring Compatible with all 46mm camera lenses & 43mm accessories. BulletPoint2 : 【2】The first number of an adapter ring is always the lens thread size,the second number is the filter size of the accessory. BulletPoint3 : 【3】High quality material,Special aviation aluminum alloy, with high mesh mechanical sandblasting and environmentally friendly anodizing on the surface, and a pure matte black color. High strength, impact resistance, deformation resistance, and compression resistance. Greatly reduces the thickness and weight of the main body. BulletPoint4 : 【4】 Please make sure to order the correct size, otherwise it will not fit your camera lens. Your lens size will be printed under the lens cover or written somewhere on the lens. BulletPoint5 : 【5】30 day warranty period, can be returned or exchanged at any time. Color : 46mm-43mm CompatibleDevices : Rollei SL35 (QBM) Rolleinar Lens and Sony E-mount Camera ExternallyAssignedProductIdentifier : 8414773325789 ExternallyAssignedProductIdentifier1 : 0640052415409 ExternallyAssignedProductIdentifier2 : 640052415409 FocusType : Manual Focus IncludedComponents : No components IncludedComponents1 : Camera Lens Mount Adapter X 1pc IncludedComponents2 : Storage Pouch X 1pc ItemDisplayDimensions_Length : 8 centimeters ItemName : CCTV 4mm CS Manual Iris Pinhole Lens ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 3.14 inches ItemPackageDimensions_Width : 3.14 inches ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-adapters Manufacturer : RageCams Material : Metal MinFocalLength : 4 millimeters ModelName : Rollei QBM-Sony E ModelNumber : SKY0901 NumberOfItems : 1 PartNumber : RC-4CSM PhotoFilterEffectType : Ultraviolet PhotoFilterSize : 49 millimeters PhotoFilterThreadSize : 49 millimeters ProductDescription : CCTV Manual 4mm CS Pinhole Lens. ProductSiteLaunchDate : 2013-11-27T19:12:40.725Z Size : Praktica B Style : LAR+UV-49 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 WarrantyDescription : 30 day refundable and exchangeable WaterResistanceLevel : waterproof