Do you test for AF accuracy after purchasing a new lens?

Started Jul 11, 2012 | Discussions thread
Leonard Shepherd
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Re: Do you test for AF accuracy after purchasing a new lens?
In reply to bokeh mon, Jul 12, 2012

bokeh mon wrote:
It is difficult to comment without seeing your full test set up - other than
1/ your viewfinder must obviously look very unsharp at nil.

2/ Nikon's web AF guidance starts with “While Nikon D-SLR cameras feature advanced autofocus systems, the autofocus system is not infallible. Autofocus may not always perform as expected under the following conditions listed below. The shutter release may be disabled if the camera is unable to focus under these conditions. Please note that the camera may believe focus has been acquired and still display the in-focus indicator and the camera may still make a beep indicating correct focus.”

Is your test target good for this lens?

The subject in your pictures is definitely one of "the following circumstances" illustrated in the Nikon guidance where "Please note that the camera may believe focus has been acquired" can be relevant to image sharpness.

Here is the difference with AF correction on and off. Tripod mount, etc. There are so many links to test charts that it is not that hard.
http://mansurovs.com/how-to-quickly-test-your-dslr-for-autofocus-issues

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Leonard Shepherd

Many problems turn out to be a lack of intimate knowledge of complex modern camera equipment.

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