SD Quattro query

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tstruth New Member • Posts: 11
SD Quattro query
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I asked this question (below) on the beginners forum and received some useful replies:

https://www.dpreview.com/forums/thread/4514781

"Hi

I'm thinking about buying a Sigms sd quattro but read that the picture quality gradually drops off above ISO100.

I'm mainly interested in landscape photography and my question is, is it possible to take lower light photography at ISO 100 by increasing the exposure time and still keep the very good picture quality gotten at ISO 100?

Or will this increased exposure time also be detrimental to picture quality?

Thanks"

Thought it might be interesting to ask on this forum if anyone has taken a low-light image at a relatvely high ISO setting (on the quattro), then the same image taken again but this time taken at ISO100 with a long(er) exposure time?  If so, was there a significant difference between the two?

Thanks

Sigma sd Quattro
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