Jim Lehman wrote:
A recent addition to my website is Frank Kujawski's interactive light and
exposure decoder located he
http://www.blackcatphotoproducts.com...ski-chart.html

This calculator is based on the Black Cat Extended Range Exposure Guide and
covers the full range of human vision. Included are listings for night
exposures and astro photography.

Nice! Now if I could just get a version of that to run on my cell
phone...

--
The challenge to the photographer is to command the medium, to use
whatever current equipment and technology furthers his creative
objectives, without sacrificing the ability to make his own decisions.
-- Ansel Adams

Donald Qualls, aka The Silent Observer http://silent1.home.netcom.com

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.