Scioptric Ball or Sky Optick, English?, Early 18th Century
|Inventory Number:|| 78216|
|Object Type:|| |
|Place Created:|| England United Kingdom Europe
|Brief Description:||Glass lens in a wood mount. Unsigned and undated. Early 18th century. |
A sky optick, or more usually 'scioptric' or 'scioptrick' consists of a long focus lens (or lenses) fixed in a universal mounting which can be placed in the window shutter of a darkened room. The sky optick will then project a reduced image of the landscape on to a wall or screen inside the room, so turning the room into a large form of camera obscura.
Sky opticks could also be used for viewing eclipses and sunspots on a screen, and the more elaborate instruments were fitted with a diaphragm for reducing the amount of light transmitted.
|Provenance:||Lent by Christ Church, Oxford in 1925.|
|Collection Group:||Orrery Collection|