IS blurring : does your 24-105mm f4 L have this problem?

Started Jan 10, 2013 | Discussions thread
OP tim73 Regular Member • Posts: 484
Survey results : 2nd update

A few more people have replied since I last posted. Since there is renewed interest, here's an updated summary of the survey.

So far I've collected 36 reports, comprising 15 bad lenses and 21 good lenses. 28 of those reports included serial numbers as follows:

  • In the range 422xxxx - 430xxxx there were 11 bad lenses and 1 good
  • Outside this range there were 15 good lenses and 1 bad
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