Don't know, but my F*300/4.5 has ED too but doesn't have the same yellow cast. So I guess it's normal since your sample is the same. :)I just looked at mine under flourescents and the first element looks yellow (you have to look at it from about 90 degrees).Mine has green and purple on the other elements. It looks slightly different from the 85/1.4 and 645 45/2.8. Neither have the yellow element. Maybe it's an ED thing?
regards,
Alan Chan
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