Why is Foveon sensor bad in low light ?

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Forum   Sigma SLR Talk
Subject   Why is Foveon sensor bad in low light ?   [SIMILAR]
Posted by   popeye69  [PROFILE]  [GALLERY]
Date/Time   12:35:49, 27 March 2008 (GMT)

Hi, I dont want to troll sigma, I am a big fan of their inovating film-like sensor & will surelly buy a DP1 for landscape photography.

But I wondered why is the foveon sensor bad in low light. Is it due to the smaller sensor size regarding other DSLR sensors ? olympus 4/3 are smaller, but doing ok, not ? (I am not talking about the dynamic range of course).

What could Sigma do to improve this weakness that surely affects the AF accuracy also on DP1 ?
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