Canon 4409B002 1.4x EF Extender III White

Canon 4409B002 1.4x EF Extender III White Type: Converters & Adapters Camera Mount: Canon EF Compatibility: This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. Magnification: 1.4x Lens Construction: 7 elements in 3 groups Dimensions: 2.8 x 1.1 in Weight: 7.9 oz. Parts: 1 year limited