Remarkably high quality for a 2X converter. Thanks Mark for lending it to me for the day... it was fun...
Autofocus was actually better on my older D2Xs than the newer D3.. go figure. When it lost focus, it was almost impossible for it to get it back without manual intervention.
This is at 800mm mounted on a 200-400mm f/4 ... I'll post more as I get to them.
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