PV Hiker Offline Upload & Sell: On
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As Roland W posted within here https://www.fredmiranda.com/forum/topic/1171044/0
Roland W wrote:
When the initial release of information about the 200-400 occurred, Canon did say that it would not accept a Canon converter, and that the opening at the rear was to small to allow one to be attached. This is similar to the Canon 2X III extender, which also will not allow a Canon extender to be mounted on its back. So unless there was a further late change to the design, no Canon extender. Non Canon extenders may function, but I doubt I will bother trying that. Remember that the optical design of the Canon super telephotos is planned in advance to work well with Canon extenders, but the included built in 1.4 extender in the 200-400 likely prevents the design from working well with an external extender.
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So like he said unless there had been a design change....
Patrick
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