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Under Exposing

deckchairboy 8:43pm, 18 April 2011
Hello
I am hoping someone will confirm the behaviour of my sony a330.

In manual exposure mode, spot metering of an 18% grey card my camera is underexposing by 1.5 stops.

Is this usual, I would have thought that with a grey card and spot metering it would hae been blob on.
I can't confirm it, but I've heard it's pretty typical of most or at least many DSLR's.
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