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Panasonic old and new versions of lenses

Started Jun 14, 2016 | Discussions thread
RCicala
RCicala Contributing Member • Posts: 820
Re: variance
2

uRebel Rob wrote:

ThePalindrome wrote:

Which brings up an interesting point, has someone done a comparative study that is sensitive and large enough to have an idea about manufacturing variation?

Roger Cicala from LensRentals did a few tests on lens variance last year (link 1, link 2). He tested 10 copies of many different models, but only goes into 24mm and 50mm models in the above links.

About number of copies to test, he says:

Ten copies of each lens is the most we have the resources to do right now. That’s not enough to do rigid statistical analysis, but it does give us a reasonable idea. In testing 10 copies of nearly 50 different lenses so far, the variation number changes very little between 5 and 10 copies and really doesn’t change much at all after 10 copies.

We've actually run that number up to 60 copies of several lenses now and found really no change in any of our numbers after 10 copies.

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