Re: SMC again (was Re: Pentax AF 100 mm f3.5 micro)

[Dan Scott]

Shel wrote:
>Alan Chan wrote:
>
>> I have had lenses from M series
>> to FA series. I cannot see their
>> SMC coatings are different.
>
>Isn't it interesting how people can look at the same things and
>see them entirely differently.  I've got SMC lenses from Takumar
>to FA, and  the coatings sure do look different to me.  The
>earlier coatings seem to be more yellow when examined in a
>certain type of light, and the later coatings have a more
>greenish or bluish color. Now, if this means that the coatings
>are different, or that the light is refracted differently for
>other reasons, I can't say.  I'd only like to add that there are
>others on this list who have observed the same color differences
>in their lenses, which also run the gamut from early to late SMC
>lenses.

Don't lenses age over time, too? Maybe what you are seeing is the
difference caused by the coatings on the older lenses oxidising over time?

Dan Scott
[EMAIL PROTECTED]


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