Purchased in 2021, I used this extender with my Canon100-400mm F/4.5-5.6L IS II lens, although seldomly. I have since sold the super lens. This extender is a Canon product, but I no longer have the original box. As shown, it comes with both caps and handy carry pouch. I can provide the sales receipt and warranty card. Now only $225 which includes shipping in the lower 48. Personal checks only please. If interested, please send me a private message and I will respond.
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