AbstractA camera obscura-type viewer based on pinhole optics, with the apertures being the holes in a commercial snack biscuit (or cracker), produces interesting and easily obtainable projected images, as demonstrated during the 2017 solar eclipse.Keywordspinhole opticseclipseGet full access to this articleView all access options for this article.Get accessReferences1. Cabe P. A. (2003) A ping pong ball camera obscura. Perception 32: 895–896. doi:10.1068/p5042.2. Pirenne M. H. (1970) Optics, painting, and photography, Cambridge, England: Cambridge University Press.3. Wade N. J. Finger S. (2001) The eye as an optical instrument: From camera obscura to Helmholtz’s perspective. Perception 30: 1157–1177. doi:10.1068/p3210.
