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

Started Mar 23, 2013 | Discussions thread
Kendall Helmstetter Gelner
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Re: Sigma's new lens testing 'A1' done on all lenses or only new ones?
In reply to nandadevieast, Mar 23, 2013

nandadevieast wrote:

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?

It was unclear to me also, but I got the feeling that they were using the new process only on the newer lenses that also supported the USB dock.

The reason I was thinking that, is that I think they may be baking a fixed adjustment factor into the lens by default based on the results of factory testing.  At least that seems like a reasonable approach to me, I have no idea if that is being done or not - but the lenses could more easily have that ability with the more flexible firmware that was designed to have custom corrections built in.

 Kendall Helmstetter Gelner's gear list:Kendall Helmstetter Gelner's gear list
Sigma 70-200mm F2.8 EX DG OS HSM Sigma 8-16mm F4.5-5.6 DC HSM Sigma 24-70mm F2.8 EX DG HSM Sigma 50-500mm F4.5-6.3 DG OS HSM Sigma 85mm F1.4 EX DG HSM +4 more
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