« on: July 14, 2013, 02:07:52 PM »
That difference is best represented as 1/2-stop, whether or not the settings of the camera result in that complete 1/2-stop being used.
Still not correct.
With a 1/2 stop setting f1.2 is actually f1.1892.
With a 1/3 stop setting f1.2 is actually f1.2599.
With both a 1/2 & 1/3 stop setting f1.4 is actually f1.4142.
This difference is why the 1/2 stop setting between f1.4 & f2.0 is f1.7 not f1.6 or f1.8 as it is less confusing due to larger numbers allowing better numeric distinction between settings.
On a side note,
Is a f1.2 lens actually 1/6 stop wider when set to 1/2 stop increments when shot wide open???