Leasowe Lighthouse : 無料・フリー素材/写真
Leasowe Lighthouse / Silver Novice of the Wirral
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | The lighthouse was lit by a wood/coal fire by which mariners would navigate, as were all lighthouses throughout the world.This parabolic reflector would in many guises be used in virtually all lighthouses within 50 years or so but Leasowe and Bidston Lighthouses was were this revelation in lighthouse illumination began.Why did the Lighthouse closeIn 1763 the only passage through to Liverpool was between the Hoyle Bank and Great Burbo Bank (sandbanks) the entrance to the sea from the River Mersey had shifting sandbanks (daily). Several attempts at opening the top channel were unsuccessful. In 1906/7 a captain Denham claimed he could do it, within a year he had opened the first mile or so and while his work progressed in 1908 shipping was progressing to Liverpool by way of the top channel and Leasowe/Bidston lighthouses became redundant and closed. How Denham managed this feat is explained in the online video.Link: www.youtube.com/watch?v=MZI4Bs53t_8The video play time is: 1 hour 16 minutes and 26 seconds. If you look at the video you can the lighthouse, on the side of the road there is a noticeboard and ALL the information you are reading here has been retyped here for you to read.This video gives you the full history of Leasowe Lighthouse which until we reopen is the best we can do but never replace a guided tour complete with atmospheric content.Hutchinson’s Parabolic ReflectorDiameter of 12ft (4mtrs) and focus of 3ft (1Mtr) having a focus of 3ft meant the flame was at a distance and therefore didn’t dirty the mirror as one with a short focus.The Lamp William Hutchinson developed the parabolic reflector after witnessing at a gentelmens convivial meeting, no doubt alcohol would be partaken of, a wager between two members that a newspaper could be read by the light of a farthing ( a British coin) candle at 30 feet (10mtrs). At the next meeting the wager was won by fixing putty inside a soup bowl and covering the area with mirror pieces and placed behind the candle. This excited Hutchinson immediately and by 1770 he was experimenting at Biston lighthouse with reflectors of up to 13ft 6inches (4mtrs plus) diameter and around 1772 parabolic reflectors were in place here at Leasowe, Bidston and Hoylake.The light from Leasowe could be seen from 20miles but without the reflector only visible for 5 miles.Prior to the parabolic reflector (1763 to 1772) an open brazier had stood on the roof and had to be kept alight in all weathers usually with wood, the room below the lamp room being called the lumber room was used for fuel storage. Having an open brazier on the roof was common throughout the world.People came from all over the world (no mean achievement in those days) to see this amazing reflector and lighthouses worldwide started to be converted from braziers to reflectors.William Hutchinson also produces the world’s first tidal maps which allowed sailors to gauge when it was safe to make into Liverpool harbour area.The notice board you can see in the photograph is divided in to two half's, the left-half is what you have just read. The righthand side shows 3 people that are connected to the lighthouse back in the day. One of stairs and the other one, an aerial view of the Wirral Peninsular.If you wish to visualise the parabolic reflector, think of a Sky TV box then enlarged the dish up to 12ftKit used: Sony RX 100 IIIref: 1263 - 28th April 2021 |
| 撮影日 | 2021-04-28 12:51:46 |
| 撮影者 | Silver Novice of the Wirral , Birkenhead, ENGLAND |
| タグ | |
| 撮影地 | Leasowe, England, UK 地図 |
| カメラ | DSC-RX100M3 , SONY |
| 露出 | 0.003 sec (1/400) |
| 開放F値 | f/5.6 |