You can get neutral density filters for those rare cases Where you want to use extremely wide f-stops. I say rare because slr cameras have very fast shutter speeds for Daylight usage and any decent studio flash is going to Have many power settings including very low ones. If & when you Hit those limits though, the neutral densities can Solve that problem for you..... jco
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Forbes Sent: Wednesday, November 01, 2006 3:45 AM To: Pentax-Discuss Mail List Subject: Re: Designing a Sensor On Wed, 01 Nov 2006 04:02:45 -0000, J. C. O'Connell <[EMAIL PROTECTED]> 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 -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
