Canon EF 1.4x II Extender, offering a 1.4x magnification. - Brand: Canon - Model: EXTENDER EF 14x II - Magnification: 1.4x - Country of Manufacture: Japan Thank you for viewing. Used only twice, I am selling this item as I no longer have the opportunity to use it. I have confirmed its operation with an EOS 5D Mark IV and EF 70-200mm lens. - There are no issues with attaching and detaching the camera and lens. - Autofocus and aperture both function correctly. Body only, original box not included.