Hue Candela has made following tables for using PinPLUS pinhole cameras for close-up photography:
The tables have rows that reflect changes for different magnification
Column one: subject to film ratio. Current table row equals 1: column's 1 value
Column two: pinhole size in inches, using the Prober-Wellman Formula.
Column three: f/stop of the PinPLUS camera length divided by pinhole size.
Column four: pinhole to the subject distance, for correct subject size on the film.
Column five: subjects horizontal view area for 5 inch distance on the film, for Col. 4 distance.
Column six: subjects vertical view area for 4 inch distance on the film, for Col. 4 distance.