Yes, at least in my case, looking for green reflections as indicative of
multicoating. As I recall, this was judged by some to be unreliable.
But, for my own experience with my own Zuikos, I've never seen an
x.Zuiko that reflects anything green (blues, reds and yellows only) and
any lens I have that says "MC" or has a serial number newer than the
"MC" marking period all reflect green. But I have multicoated Kirons
that don't reflect green.
I suspect great caution is required here since it was reported back then
that Olympus first started multicoating selected elements long before
all elements were multicoated and supposedly before "MC" became an
important marketing factor and placed prominently on the lens. It is
probably much more important to multicoat certain interior elements to
control interior reflections than it is to multicoat the front side of
the front element which would only make a miniscule improvement in light
transmission.
Chuck Norcutt
Moose wrote:
>>
>
> If I recall correctly, those were the days of peering deep into the lens
> looking at reflection colors. Wasn't the "MC" column to be a judgment
> based on observation of the coating themselves? Others, and I to a
> limited extent, have noticed that the coatings changed character with
> later production within both SC & MC. This may have been a late version
> of mostly single coating with a different formula and/or a multiple
> coating or two that fooled the eye.
--
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