• Dustproof and waterproof specifications (JIS 2 equivalent) • Lens placement and coatings are optimized to minimize the ghosting • Built-in microcomputer in the extenders enables communication between lens, extender and camera • Anti-smear coating (Silky Barrier Coating) used to enhance smear-free state of the lens surface
1.4x increase of the lens's focal length
Canon Extender EF 1.4xIII
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