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Forums > Back > next PZ lens test report: Sigma AF 50mm f/1.4 EX HSM DG (full format)
#32
A focus shift at max. aperture isn't really possible by definition. In this case you've "just" a back-/front-focus problem.

That said it can be calibrated this way on purpose assuming that it hides the worst at smaller apertures.
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next PZ lens test report: Sigma AF 50mm f/1.4 EX HSM DG (full format) - by Klaus - 06-07-2010, 11:35 AM

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