2x converter lets 1/4 light through. Therefore, your lens should be at f/5.6 instead of f/11
Best, mishka > If i'm reading say, 1/250 f 11,what do i set the > lens at.If the converter is letting in 1/2 the light > as Tom R mentioned,it is now an F8 lens,so should i > set the aperature ring on F 8 in stead of F11
