Hi--

>What I am expecting to happen is that the metered difference between
>no filter and filter is less than the specified absorption value. My
>experiment should show me the correct compensation to use for a
>particular meter and filter.
>
>For example, suppose my TTL meter on a gray wall gives f11 with no
>orange filter and f8 with an orange filter. This is one stop
>difference. Also suppose the absorption value is specified as two
>stops by the filter manufacturer. My conclusion is that when I use
>the orange filter I must compensate by one stop (in addition to the
>one stop that the meter already compensates).

I think you've got it! ;-)

>Is this what happens? Is this what your test was trying to explain?
> cjones@au.oracle.com

Yes - sorry my explanation was not adequate (I try to be brief...;-).
(You may want to add the above to the thread - or if you posted the above,
I will respond with the above when I see it...;-)