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

[P�l Jensen]

Alan wrote:

I have had lenses from M series to FA series. I cannot see their SMC 
coatings are different.


Then Shel wrote:

The new ones have not been cleaned.  The older ones look like
the newer ones of their series, and, as I said earlier, each
series show differences in the the coatings.



REPLY:
There is indeed a difference between SMC coatings from different eras. Lately, 
however, Pentax seems to use different coating for different lenses. Eg, FA-series 
lenses may vary widely in coating properties. An example: The FA* 85/1.4 and 77 
Limited have a dark violet color while the FA* 200/4 ED IF Macro show a greenish color 
tint with no hint of violet. Its apparent to me that Pentax uses coatings with 
different properties for these lenses.

Pål



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