Thanks Brandon. I still have 12 more toners to image and post!
I prefer to keep my effective aperture below f12 or so to avoid strong diffraction effects. For full frame Cent photos, the magnification is around 0.84 to fill my Nikon sensor. Since the effective aperture is Feff = Finf (1 + M), this gives an Feff=10.3 for Cents at f5.6. For Dollars, you can stop down to f8 since the mag is lower (M=0.42). This gives Feff=11.4.