Designing a Sensor

[John Forbes]

On Wed, 01 Nov 2006 04:02:45 -0000, J. C. O'Connell <hifisapi at gate.net>  
wrote:

> My guess would be the sensor "base" speed is the speed
> At which no extra light ( slower sensor speed ) will improve
> The image quality any signifigant amount. No sense in
> Going slower if it doesn't improve anything.

If you are shooting with studio flash, and can't turn it down low enough  
to give you short DOF, then there is a very good reason to have lower ISO,  
whether or not it improves the quality.

Same goes for bright daylight.  It's purely a theoretical concept in the  
UK, but in  other countries one wishes one could reduce the light  
intensity at times.

John

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