Re: to test EI for color negatives

On Feb 25, 4:06 pm, Father Kodak <dont_bot...@[EMAIL PROTECTED]
> wrote:
> On 14 Feb 2007 18:50:15 -0800, "Steven Woody" <narkewo...@[EMAIL PROTECTED]
>
> wrote:
>
> >i am so happy i now can home test speeds of b&w negatives.  i adapted
> >the method from Adams's books which told me how to find 0.1 density
> >point on the negative by using a lightbox and a spot meter. it's
> >great.
>
> Which of Adams' books?  Can you summarize here?
>
> Thanks,
>
> Father Kodak


in 'The Negative', Adams introduced a method of using a spot meter to
measure film density. 0.3 unit of EV difference ( in log_2 ) in your
meter means density difference of 0.1 ( in log_10 ). that's it.