The May 2010 survey as well as the examples and tests on previous pages show clearly that the Nikon AF-S 24mm f/1.4G can have serious focusing issues. In some tests it was spot-on, and in others off a little bit, and in one instance, wildly inaccurate.
A plausible explanation other than “unreliable and/or defective” has not yet emerged.
The following was true of the sample I used for testing and is consistent with reports from the survey:
- Except by luck, focus at infinity is almost always badly front-focused on both the D3s and D3x;
- Focus error is always to the front eg closer than desired. Never to the rear.
- It is possible to get consistent and accurate results under some conditions.
- Close range focus ( 10 feet or less) generally seems accurate.
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