Unknown Model American Heliograph : 無料・フリー素材/写真
Unknown Model American Heliograph / signal mirror
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | Unknown model heliograph. If anyone recognizes the make, please add the info as a comment. Don't be fooled by its resemblence to the American Signal Service heliograph. model 1905. There many differences. For example, the mirror bar is much simpler - it is constant in vertical thickness Also, the shutter is rack-and-pinion. To see a Model 1905 American heliograph for comparison, see here: www.flickr.com/photos/signalmirror/8669990143/in/set-7215... |
| 撮影日 | 2013-10-12 15:28:10 |
| 撮影者 | signal mirror |
| タグ | |
| 撮影地 | |
| カメラ | DMC-FZ28 , Panasonic |
| 露出 | 0.002 sec (1/500) |
| 開放F値 | f/6.3 |