[pure-silver] Re: estimating filter factor: gray card?

  • From: Camclicker@xxxxxxx
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Sat, 30 Sep 2006 22:50:02 EDT

In a message dated 9/30/2006 10:18:43 P.M. Eastern Daylight Time,  
sstoney@xxxxxxx writes:


No,  if the filter factor is 2 x you would open 1.41 stop not  1,



!!!! This is very confusing.  Why do they call the filter factor 2  if it's 
really 1.4?


--shannon

 
 
Ahhhhh, I don't know.  Maybe Ralph, Richard or someone knows.
 
Bruce  Osgood
Camclicker @ aol.com
Brooklyn,  NY.

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