Quote Originally Posted by Greg Heath View Post
I found a neat little program for the iphone... called pinhole assist. it's $1.99

With "Pinhole Assist"

Compute exposure time ;
Measure light;
Enter your camera aperture from the predefined list or compute it;
Let the assistant automatically compensate for reciprocity of film (correction for long exposures), or use your own curves.

or this for free:PinHoleDialAssy.pdf