How do I use the ExpoAperture2 with Medium Format 4×5 and Large Format 8×10 film cameras?
The ExpoAperture2 was designed specifically for use with cameras utilizing sensor or film sizes requiring 15 to 60 microns of resolution in their circle of confusion depth-of-field calculations. The 15 to 60 micron range printed in the green film format/sensor setting region of the ExpoAperture2 represents all modern DSLR cameras, and most film cameras, including 1/2 size 35mm film, 35mm film, 4×4, 6×4.5 and 6×6 format. Two film camera formats not explicitly included on the ExpoAperture2, specifically the medium format 4×5 and the large format 8×10 require 120 microns, and 240 microns, respectively, to accurately perform depth of field calculations. While we did not extend the green sensor size/ format setting region to include 120, and 240 microns, it is still possible to perform depth-of-field calculations for the 4×5 and 8×10 format cameras using the ExpoAperture2. For medium format 4×5 film cameras, the simplest method for making depth-of-field calculations requires moving the sens
