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| A small hole in the shutter of a darkened room will make an inverted and upside-down imge of the scene outside. The image has no exact position of focus. back / more | ||
| about / history / how to make / where to visit |
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| A small hole in the shutter of a darkened room will make an inverted and upside-down imge of the scene outside. The image has no exact position of focus. back / more | ||
| about / history / how to make / where to visit |