The optimum focal distance is in the 17mm range.The closer to the sensor or film plane the winder the angle.
0.2mm DIY Laser drilled Pinhole for Wide Angle Photography Short Focus Camera
0.15mm and 0.2mm Photon drilled Pinhole Photography Camera
1.0mm Laserdrilled Pinhole Large 1" SLR DSLR Canon EOS Nikon Camera photography
0.15mm Laserdrilled Pinhole Large 1" SLR DSLR Canon EOS Nikon Camera photography
0.05mm Laserdrilled Pinhole Large 1/2" holder for telescope foucault tester
0.3mm Laserdrilled Pinhole Large 1" Photography Camera large format 4x5 5x7 8x10
