Babbage Difference Engine CHM 8-8-14 : 無料・フリー素材/写真
Babbage Difference Engine CHM 8-8-14 / THE Holy Hand Grenade!
| ライセンス | クリエイティブ・コモンズ 表示-改変禁止 2.1 |
|---|---|
| 説明 | Charles Babbage's Difference Engine, as displayed by the Computer History Museum in Mountain View, CA. One of the docents is leaning over in front of the machine... Taken by a Nikon D610 at ISO 400 with a Nikkor 50mm ƒ 1.8 AF-D lens. Exposure is 1/25 sec @ ƒ 2.5...The main machine (the columns) does the computing, the part at left is for engraving straight to a printing plate... (Babbage had discovered that many of the errors in the tables used at the time (1822) weren't in calculation, they were in setting the type for the table... and fatigue on the proofreader's part!)(one of the jokes in computing circles is that most technical proofreaders have dyslexia... and self-describe their profession as proffredder...)The CHM's machine was made to the tolerances capable of being made in Babbage's time, proving that the design would have worked, as this machine does work. (if Babbage had ever finalized a design, that is!)Update: since this shot was posted, the Difference Engine has been re-located away from the CHM to an unknown (to the poster) location... |
| 撮影日 | 2014-08-08 12:51:28 |
| 撮影者 | THE Holy Hand Grenade! , Albany, CA, USA |
| タグ | |
| 撮影地 | Mountain View, California, United States 地図 |
| カメラ | NIKON D610 , NIKON CORPORATION |
| 露出 | 0.04 sec (1/25) |
| 開放F値 | f/2.5 |
| 焦点距離 | 50 mm |