Specification Brand : OPTURA HD OPTICS BulletPoint1 : Doubles Focal Length of Lenses (4-Elements) BulletPoint2 : Multi-Coated Optical Glass with Anti-Reflection Coating BulletPoint3 : 2X HD AF MF OPTICAL CONVERTER FOR Canon EF 70-200mm f/4L USM Lens = 140-400MM BulletPoint4 : Built-In Write-Protect Switch BulletPoint5 : UHS-I / U1 / Class 10 BulletPoint6 : Max Write Speed: 10 MB/s BulletPoint7 : Records Full HD Video and Still Photos BulletPoint8 : Can Withstand Extreme Temperatures BulletPoint9 : All our Memory Cards have a five year warranty. Color : Black CompatibleDevices1 : Camera CompatibleDevices2 : Camcorder CompatibleMountings : Canon EF FocalLengthDescription : 2X TELECONVERTER IncludedComponents : 2X TELECONVERTER ItemName : 2X HD AF MF OPTICAL CONVERTER for Canon EF 70-200mm f/4L USM Lens = 140-400MM ItemPackageDimensions_Height : 0.52 inches ItemPackageDimensions_Length : 5.1 inches ItemPackageDimensions_Width : 3.95 inches ItemPackageQuantity : 1 ItemTypeKeyword : digital-camera-accessory-kits Manufacturer : OPTURA HD OPTICS MemoryStorageCapacity : 16 GB ModelName : FS22 NumberOfItems : 1 PartNumber : OPTURA-2X ProductDescription : A 2X teleconverter, also known as a teleconverter or tele-extender, is a lens accessory used in photography to increase the focal length of a lens. It effectively magnifies the focal length of the lens by a factor of 2x, hence the name "2X teleconverter". ProductSiteLaunchDate : 2024-03-28T02:14:18.411Z ReadSpeed : 95 megabytes_per_second SecureDigitalAssociationSpeedClass : class_10 SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 3 WarrantyDescription : 1 YEAR