Chuck Norcutt wrote:
> We once conducted a survey amongst ourselves of all our lenses in an attempt
> to define what was multicoated and what was not by serial number and other
> identifying characteristics. Here are the results for 35/2.8
>
> Focal Aperture S/N Chrome/ Coating MarkedMC? Lens Name
> Length Black
> -------- ---- ------ ------ ------- --------- ---------
> * 35 2.8 102000 Black MC Yes Zuiko MC
> 35 2.8 129700 Chrome SC No
> 35 2.8 141114 Chrome SC No G. Zuiko
> 35 2.8 145960 Chrome SC No G. Zuiko
> 35 2.8 149151 Chrome No G. Zuiko
> 35 2.8 152700 Chrome SC No G. Zuiko
> * 35 2.8 173122 Black MC No G. Zuiko
> 35 2.8 177594 Black SC No G. Zuiko
> 35 2.8 182901 Black SC No
> 35 2.8 190492 Black SC No
> 35 2.8 213828 Black SC No G. Zuiko
> 35 2.8 230319 Black SC No X. Zuiko
> 35 2.8 246000 Black MC No G. Zuiko
> 35 2.8 251229 Black MC Yes Zuiko MC
> 35 2.8 252042 Black MC Yes Zuiko MC
> 35 2.8 260800 Black MC Yes Zuiko MC
> * 35 2.8 277800 Black SC No Zuiko
>
> Note that there are some apparent outliers here which I have marked with
> an asterisk. 102000 is probably too early to be MC but the lens is clearly
> marked MC.
Almost certainly a mis-reporting of some sort. There are some others in
the overall list.
> 173122 doesn't seem to fit its surroundings and
>
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.
> 277800 should certainly be multicoated at that high serial number.
Looks like a misunderstanding of the naming conventions on the part of
the one reporting. As the eSIF says and msot of us have observed, "Once
multicoating was so self-evident, that all lenses were produced
multicoated, the MC addition was also dropped and the lenses only
contained the word ZUIKO."
Moose
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