My guess is that the formula change was probably done as a cost
reduction. Probably the availability of a higher index of refraction
glass allowed knocking two elements down to one and eliminated a
cementing and centering operation. Based on Gary's tests it may have
improved performance slightly. But that could be sample variation
because we only know that the lens was multicoated which accounts for
the contrast improvement. We don't know for sure that it was the newer
5 element lens producing the slightly higher letter grades.
Chuck Norcutt
Moose wrote:
> NSURIT@xxxxxxx wrote:
>>
>> Dang it, Moose. There you go again trying to throw in an on topic posting.
>> The Zuiko police may be giving you a call.
>>
>> This could make for a real lively discussion if the change from SC to MC
>> occurred at a different time than the change in design.
>>
> Unless someone has seen an E.ZUIKO 85/2, the formula change would have
> to have occurred after the switch to MC. F.ZUIKO means six elements.
>
> Moose
>
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