Alan Chan http://www.pbase.com/wlachan
I used a genuine Pentax 52mm polorizer for the shot at:
http://www.iol.ie/~pkcurran/TestScans/ScanTest.htm
I have just had a look at the filter and it does not say 'SMC' on the ring.
My 'Asahi Pentax Special Filters' brochure has a table on the back page
listing SMC and non-SMC filters "now available". Not sure what date this was
printed but it would be pre 1985. The only Polarizers listed are all non-SMC
(Sizes 49mm, 52mm and 58mm)
Regards,
Pat
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