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shutterbug guy wrote:
It's all about the light, some bodies perform better than others with limited aperture. At f6.3 we're seeing this, plain and simple.
So my 1D4 has no problem focusing with a 1.4x TC on a 400 f5.6 or 100-400 f5.6, and my 400 DO has no problem focusing with a 2x TC on it, all now at f8, and you say my 1D4 has a problem with the Tamron is because it is f6.3 Yeah, sure.
And once again, the problem has nothing to do with the focus-limiter setting, focus-search on or off, poor lighting, or a poor contrast subject.
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