Hi Hans:
Thanks for passing along your research into the 180mm f/2.8 / 1.4X-A
combo question.
I guess it's another example of optical reconfiguration after a
multicoating change. In this case a change from MC Zuiko to Zuiko
multicoating. FWIW, the optical cross sections in the 30-ring SIF
versus the 3-ring SIF look identical.
Gary Reese
Las Vegas, NV
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