Animated Antique Posographe 4+
Ace Hoffman
iPad対応
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- 無料
スクリーンショット
説明
The Kaufmann Posographe is a fascinating mechanical contraption which was used by photographers in the early 20th Century to set their exposure times. Back then exposures were measured in seconds, and everyone in the picture had to freeze ("pose") for the entire time. Film plates were expensive and difficult to handle, so do-overs were avoided as much as possible. Over 100,000 French versions of the Posographe were sold alone, as well as tens of thousands of English-language versions. (Although this program is in English, the far more common French Posographe is depicted.)
This animation was originally created based on an article in the Oughtred Society's bi-annual journal, Spring 2019 issue, and then the lead programmer purchased an antique Posographe in order to make more accurate measurements and higher resolution photographs, to check the placement of some hidden connections, and lastly, to test the accuracy of the model against an actual Posographe. It’s very close!
Kaufmann invented and patented several versions of the Posographe and a couple of other related mechanical contraptions. The mathematical theory behind how the Posographe works was conceived around the same time, and Kaufmann apparently had a number of correspondences with the mathematician who invented the theory. Although the theory is not explained here, the math behind the Posographe is illustrated with connecting lines, colored brass plates (or not, if you prefer!), circles indicating intersecting positions of the pieces, and various additional ways of exploring "under the hood."
This program has fairly extensive math operating in the background, so it's best to have lots of battery life if running the program while on a batteries, especially if you turn on the "auto-move" feature and simply watch it run -- which is a lot of fun to do, by the way!
If using a keyboard, the following keys are available:
+ = enlarge item under mouse
- = shrink item under mouse
arrow keys = move item under mouse
enter key = guide page
a = animate Posographe
s = snake
アプリのプライバシー
デベロッパである"Ace Hoffman"は、プライバシー慣行およびデータの取り扱いについての詳細をAppleに示していません。詳しくは、デベロッパプライバシーポリシーを参照してください。
詳細が提供されていません
デベロッパは、次のアプリアップデートを提出するときに、プライバシーの詳細を提供する必要があります。
情報
- 販売元
- Ace Hoffman
- サイズ
- 31.1MB
- カテゴリ
- 教育
- 互換性
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- iPhone
- iOS 8.0以降が必要です。
- iPad
- iPadOS 8.0以降が必要です。
- iPod touch
- iOS 8.0以降が必要です。
- Mac
- macOS 11.0以降とApple M1以降のチップを搭載したMacが必要です。
- Apple Vision
- visionOS 1.0以降が必要です。
- 言語
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日本語、 イタリア語、 インドネシア語、 オランダ語、 ギリシャ語、 スウェーデン語、 スペイン語、 タイ語、 チェコ語、 デンマーク語、 トルコ語、 ドイツ語、 ノルウェー語 (ブークモール)、 フィンランド語、 フランス語、 ヘブライ、 ベトナム語、 ポルトガル語、 ポーランド語、 マレー語、 ロシア語、 簡体字中国語、 繁体字中国語、 英語、 韓国語
- 年齢
- 4+
- Copyright
- © 2019 Animated Software Company
- 価格
- 無料