Thank you for forwarding the focal length measurement performed at Hoya Japan.
We noticed that you only measured 5 out of the samples we have sent to you. In order to draw conclusion that is statistically significant, we think that the sample size of 5 is too small. We believe it will be beneficial if Hoya Japan can measure 10 more samples each from the two batches we sent to you (good and short).
Please let us know if this is possible.