Quote Originally Posted by dwross View Post
Oh, heavens, no. At the 45th parallel, this recipe

gets 6 to 40, depending on time of year and time of day, and to a lesser extent, altitude. (It is impossible to place a single ISO number on anything but panchromatic films. .)


How on earth can I shoot with a "film" if I don't know what the ISO is? The range 6-40 is about three stops! It would take a serious investment in time to get a shot off, and then the exposure is a crap shoot. Are the panchromatic plate emulsions more predicitible?

Kent in SD