Shannon Stoney wrote:
In a message dated 9/30/2006 7:35:49 P.M. Eastern Daylight Time, sstoney@xxxxxxx writes:
*"As I understand it, if the filter factor is 2X, you open up a full stop,"* or you double the exposure time. So, opening up a third of a stop would be the same as multiplying the time by 1.3. For example: let's say the exposure at f/64 should be 6 seconds, without the filter. With the filter, it would be 8 seconds, or 6 times 1.33
Shannon,
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
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