Readings on the Camera Obscura

 
Camera Obscura - Wikipedia

Camera Obscura - Encyclopedia Britanica, 1902

Aristotle on Eclipses - light from the Sun passing through small openings but similar to Ptolemy's Optics on paraxial rays.

Euclid's Optics - Wikipedia

della Porta - Wikipedia

Magiae Naturalis, Io. Baptistae Portae
Quomodo Solis eclipsis videri possit - Google Translate

Reinhold - Wikipedia

Pinhole Photography - Renner (good book on the subject)