PinPlus cameras for telephoto pictures
This sires of PinPLUS cameras have a small angle of view, but light from a pinhole into the camera body is 170 degrees in all directions. Therefore baffeling is required to attenatuate the out of film picture light that passes through the pinhole. Otherwise the bounced light will fog the picture, and/or remove any chance of pure black in the picture.
CAMERA BY PART NUMBER FOCAL LENGTH INCHES RATIO

subject:film

VIEW IN DEGREES DIAGONALLY VIEW IN DEGREES HORIZONTALLY VIEW IN DEGREES VERTICALLY EQUIVALENT 35MM LENS
PinPLUS 256mm 10.1 1:2.0 33 28 22 100
PinPLUS 384mm 15.1 1:3.0 23 19 15 150
PinPLUS 512mm 20.2 1:4.0 17 14 11 200
PinPLUS 640mm 25.2 1:5.0 14 11 9.0 250
PinPLUS 768mm 30.2 1:6.0 11 9.5 7.5 300
PinPLUS 1024mm 40.3 1:8.0 8.6 7.1 5.6 400
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