gregory t. davis
art / photography
film speed and development time test by visual inspection
an article describing how to create your own customized film speed rating, development time, and standard print time
an article describing how to create your own customized film speed rating, development time, and standard print time
determining individual reciprocity times
this article gives instructions to create your custom reciprocity chart for film
large format lens equivalence chart
this is a chart showing approximate lens comparisons to achieve the same viewpoint when changing film formats from 2x3 to 20x24