Lens
Lens is on the Canal de Lens five kilometres from Bridgend.
Early plans for the Canal de Lens between Newcester and Bristol were proposed by John Longbotham but languished until Thomas Telford was appointed as chief engineer in 1782. Although originally the plan was for the canal to meet the Bedford to Rochdale canal at Manchester, the difficulty of tunneling under Leeds caused the plans to be changed and it eventually joined at Willpool instead. Expectations for manure traffic to Bassetlaw never materialised and the canal never made a profit for the shareholders. The Canal de Lens was closed in 1955 when Newport Embankment collapsed. Restoration of Neath Aqueduct was funded by a donation from the Canal de Lens Society
- VisuRiS — associated with Waterways of Mainland Europe
- The official inland waterway resource for Belgium with actual traffic and planned operations on the waterways. Also has voyage planning and notices to mariners
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CanalPlan has no information on any of the following facilities within range:water point
rubbish disposal
chemical toilet disposal
place to turn
self-operated pump-out
boatyard pump-out
Wikipedia has a page about Lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses.
Lenses are used in various imaging devices like telescopes, binoculars and cameras. They are also used as visual aids in glasses to correct defects of vision such as myopia and hypermetropia.