where do you find a natural pinhole camera
Pinhole camera A pinhole camera effect can sometimes occur naturally. Small "pinholes" formed by tree leaves will create replica images of the sun on flat surfaces. During an eclipse, this produces small crescents in the case of a partial eclipse, or hollow rings in the case of an annular eclipse.
AS/NZS 3112 The plug pictured on the left, as used in Australia, New Zealand, Fiji, Papua New Guinea and many Pacific Island countries, has two flat pins forming an inverted V-shape plus a vertical earthing pin. These flat blades measure 6.35 by 1.6 mm (1⁄4 by 1⁄16 in) with the Active and Neutral pins 17.35 mm (11⁄16 in) long set 30° to the vertical and the vertical Earth pin being 20 mm (0.787 in) in length.[2] The pins are arranged at 120° angles around a common midpoint, with the Active and Neutral centred 7.92 mm (5⁄16 in) from the midpoint, and the Earth pin centred 10.31 mm (3⁄8 in) away.[2]