<p>I have 'em both. The 80-400 I almost sold while using the D200 (very slow) but then with the D700 the lens got revived and is doing quite good...
<p>@Bruce Brown: I second that and there is no known cure for this infection....... but to own it.</p>
<p>My comment: "2. is it set to f22?" should be f16 for the 50mm/ 1.4</p>
<p>Two things come to my mind:<br>
1. is the lens locked in properly?<br>
2. is it set to f22?</p>
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