Duluth South Pier Inner Range Light - Original Fresnel Lens : 無料・フリー素材/写真
Duluth South Pier Inner Range Light - Original Fresnel Lens / pmarkham
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | This is a closeup of the original fresnel lens for the Duluth South Pier Inner Range Light. In this shot you can see two of the flash panels. It was mounted on a brass frame and rotate originally by a small clockworks mechanism that was driven by counter weights. The lens was removed from the lighthouse and is now displayed by the Canal Park Marine Museum. It is currently being rotated by an electric motor that drives the gears that the clockworks originally drove. |
| 撮影日 | 2012-07-11 17:52:27 |
| 撮影者 | pmarkham , Loretto, USA |
| タグ | |
| 撮影地 | |
| カメラ | NIKON D7000 , NIKON CORPORATION |
| 露出 | 0.017 sec (1/60) |
| 開放F値 | f/5.0 |
| 焦点距離 | 50 mm |