Hi Bill
As you have noted, best value lens out there right now is this (not mine): https://www.talkphotography.co.uk/threads/canon-ef-400mm-f-2-8l-is-ii-usm-lens.586525/
If I was still with Canon I would have it in a heartbeat.
Also, I am not sure why but I agree that the Canon TCs retain AF speed better than Nikon ones. The optical performance is identical though with the latest version s of both x1.4 and x2 TCs.
As you have noted, best value lens out there right now is this (not mine): https://www.talkphotography.co.uk/threads/canon-ef-400mm-f-2-8l-is-ii-usm-lens.586525/
If I was still with Canon I would have it in a heartbeat.
Also, I am not sure why but I agree that the Canon TCs retain AF speed better than Nikon ones. The optical performance is identical though with the latest version s of both x1.4 and x2 TCs.
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