Sigma's new lens testing 'A1' done on all lenses or only new ones?

Started Mar 23, 2013 | Discussions thread
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nandadevieast
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Sigma's new lens testing 'A1' done on all lenses or only new ones?
Mar 23, 2013

Hi,

They said they are testing their lenses on A1, to ensure better focus accuracy.

Are all current lenses being manufactured going thru this process? Or only the few art/C lenses?

So lets say, the 85/1.4 testing is also done like that, or is it old process....

Any idea?

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