On Wed, 30 Oct 2002 06:07:12 GMT, "Tom Thackrey" wrote:
>On 29-Oct-2002, "J. Boyer" wrote:
>> "Neuman - Ruether" wrote in message

[...]
>> > BTW, f1.8 and f1.4
>> > are more than 1/2 stop apart...
>> > David Ruether

>> Good point, there is about 1 stop difference between the two.

>f/1.4 to f/1.8 is 2/3 of a stop. Closer to 1/2 than 1.

But, "2/3rds stop faster" is more interesting than
"1/2 stop faster", and more accurate...;-)