Description of Canon EF 1.4x Extender:
The Canon 1.4x can be used with fixed focal length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens), and the Canon EF 70-Canon EF 200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, and 100-400 f/4.5-5.6L IS zoom lenses. Superb optically, Canon EF 1.4X II preserves the image quality of the lens it's mounted to and multiplies its focal length 1.4x. Effective aperture is reduced by one f-stop; autofocus is possible on any EOS camera when combined with a lens having an f/4 or faster maximum aperture. The new version II maintains the outstanding optics of the previous version, and adds enhanced weather- resistant construction, and improved anti-reflective surfaces in the barrel.
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Canon EF 1.4x Extender Box Contents:
1-Canon front & back caps
2-Canon instruction manual.
3-Canon soft case
4-Canon box Box.