Specification Brand : Bower BulletPoint1 : Doubles focal length of digital Canon SLR lens BulletPoint2 : Enhanced exposure at the converted focal length BulletPoint3 : 4 element construction BulletPoint4 : Optimal when used with lenses of maximum aperture f/4.0 and greater BulletPoint5 : Compatible with all Canon digital SLR cameras (except 18-55 kit lens) Color : Black CompatibleDevices : FE 28mm F2^Sony CompatibleMountings : Sony ExternallyAssignedProductIdentifier : 7432136080060 ExternallyAssignedProductIdentifier1 : 636980411941 ExternallyAssignedProductIdentifier2 : 0636980411941 ExternallyAssignedProductIdentifier3 : 00636980411941 FocalLengthDescription : 16 mm FocusType : Auto Focus IncludedComponents : Protective case and protective caps (Front and Back) ItemName : Bower SX4DGC 2x Teleconverter for Canon (4 Element) ItemPackageDimensions_Height : 7.874 centimeters ItemPackageDimensions_Length : 8.128 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : camera-lens-adapters Language : english LensDesign : Prime LensMount : sony_e MagnificationMaximum : 42 multiplier_x Manufacturer : Bower Material : Aluminum alloy MaxAperture : 2.8 f_stop MaxFocalLength : 85 millimeters MinAperture : 22 MinFocalLength : 85 millimeters ModelName : fisheye lens ModelNumber : SX4DGC MountingType : Sony NumberOfItems : 1 OpticalZoom : 0.14 multiplier_x PackageLevel : unit PartNumber : SX4DGC PhotoFilterThreadSize : 55 millimeters ProductDescription : This adapter allows RMS thread (.8" x 36 tpi) objectives. Can Also be used if you have a M42 x 1mm to your camera adapter and you can use microscope objectives with movie cameras, DOF systems and other devices. The cone-shaped adapter is 52 mm in height. Made of anodized aluminium. Please Note : the sale is only for the adapter and not the lens. Lens is only shown for pictorial description of the usage of the adapter ProductSiteLaunchDate : 2011-10-24T00:00:01-00:00 RealAngleOfView : 105 degrees Size : 55mm StreetDate : 2015-07-20T00:00:01Z Style : Canon SupplierDeclaredDgHzRegulation : not_applicable WarrantyDescription : 3-year limited warranty WaterResistanceLevel : not_water_resistant