Canon Extender EF 1.4X III OverviewThe Extender EF 1.4X III from Canon is designed for select Canon EF mount L-series telephoto lenses.'It increases the focal length of a lens by a factor of 1.4x while still delivering superb image quality. To ensure the best possible image quality in all shooting conditions, it combines redesigned optics, improved data communication between lens and camera and enhanced environmental protection. It is ideal for photojournalists and wildlife, nature and sports photographers who need to get close to distant and challenging subjects and it reduces the need to carry heavy telephoto lenses.What's In The BoxCanon Extender EF 1.4X IIIExtender Cap E IILens Dust Cap E (Rear)Lens Case LP811Extra Bundle Items:1 x Padded Carrying Case (Protect Your Gear!)1 x Lens Pen Cleaner1 x High Quality Dust Blower1 x Lens Cleaning Solution1 x Blower Brush1 x Lens Tissue Paper5 x Cotton Swabs1 x Deluxe 70" Monopod1 x Lens Cap Keeper (Dont Lose your Caps!)1 x MicroFiber Cloth1 x Large Cleaning Bottle for LCD Monitors2 Year Extended Warranty Included (Replaces Manufacturer Warranty)