***NOTE*** request only genuine buyers to contact. Please make way for someone who can make good use of it.
2x increase of the lens's focal length
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
Canon extender EF 2x III unused
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