UV or Polarizer 52mm filter?

I don't know enough to be sure, Miles, but I can't see how linear polarisation would affect measurement of contrast at the sensor.  If they are OK with CDAF it means the wheel is coming full circle and the more expensive CPLs will get rarer.

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Gerry
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First camera 1953, first Pentax 1985, first DSLR 2006
http://www.pbase.com/gerrywinterbourne