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The Canon EF 1.4x II Extender is a high-quality teleconverter that preserves the image quality of the lens it's mounted to and multiplies its focal length by 1.4x. When combined with pro level EOS cameras & EF supertelephoto lenses with image stabilization, near imperviousness to weather extremes is achieved thanks to rubber gasket seals. Improved anti-reflective internal coatings also increase transmissivity & performance in backlit conditions.
The extender will cut back the amount of light by one f/stop. For example using a 1.4x teleconverter with a 300mm f/2.8 lens will effectively increase the focal length to approximately 420mm and the f/2.8 aperture will now be f/4. Teleconverters are best used with longer telephoto lenses and are not recommended for lenses wider than 50mm, e.g. 28-105mm (35mm format).
Note: This teleconverter will only fit and work with a select list of lenses. Please click here for the compatibility chart of all compatible lenses.
| Magnification | 1.4x |
| Lens Elements/Groups | 5/4 |
| Length | 1.1" (27.2mm) |
| Diameter | 2.9" (72.8mm) |
| Weight | 8 oz (220g) |
| Box Dimensions (LxWxH) | 3.8 x 4.6 x 3.8" |
• Canon 1.4x EF Extender II (Teleconverter)
• Canon Extender Cap E II Front Cap for EF 1.4x & 2x Tele Extenders
• Canon Lens Dust Cap E (Rear Lens Cap)
• Canon Lens Case LP811
• Brand New Factory Fresh Import Model
