SR - SHAKURITAKUION,SHAKURIDUKUION

Japanese: SR - しえいくりたくしよん,しぇいくりだくしょん
SR - SHAKURITAKUION,SHAKURIDUKUION
Acronym for Shake Reduction. A unique image stabilization mechanism that Pentax first introduced in its compact digital camera, the Optio A10 (released in March 2006). Structurally, two gyro sensors installed inside the camera detect the degree of camera shake. A dedicated CPU calculates the necessary correction value based on the amount of camera shake, the zoom position of the lens, and focal length information. Based on this correction value, the image sensor is moved up, down, left, and right to cancel out the camera shake. This is a so-called CCD shift method, and the origin of the idea is the same as Konica Minolta's Anti-Shake. Incidentally, this SR works when shooting still images, and electronic movie image stabilization works when shooting movies. Furthermore, in May 2006, the same image stabilization function was adopted for the digital SLR camera, the Pentax K100D. Although it is called SR (Shake Reduction), the feature is that while the compact digital camera Optio uses a step motor to drive the image sensor, the K100D uses a magnetic drive system with a permanent magnet and coil. With this system, the image sensor is supported only by three balls, so there is no resistance from a normal guide, and it has the advantage of being able to move quickly not only up and down, left and right, but also diagonally.

Source: CameramanWeb Cameraman Photo Terminology Dictionary Information

Japanese:
Shake Reductionの頭文字。ペンタックスが同社のコンパクトデジタルカメラ、Optio A10(2006年3月発売)ではじめて登場させた独自の手ぶれ補正機構。構造的には、まずカメラ本体内に搭載された2つのジャイロセンサーが手ぶれの度合いを検出。その量とレンズのズーム位置、焦点距離情報をもとに必要な補正値を専用のCPUで演算。その補正値にもとづいて撮像素子を上下左右に動かして手ぶれを打ち消す。いわゆるCCDシフト方式で、発想の原点はコニカミノルタのAnti-Shakeと通じる。ちなみにこのSRは静止画撮影時に働き、動画撮影時には電子式動画手ぶれ補正が働く。  さらに2006年5月、デジタル一眼レフカメラ、ペンタックスK100Dにも同じく手ぶれ補正機能が採用された。呼称は同じSR(シェイクリダクション)だが、コンパクトデジタルカメラのオプティオが撮像素子の駆動にステップモーターを利用していたのに対して、K100Dでは永久磁石とコイルによる磁力駆動方式を採用しているのが特長。この方式は撮像素子が3点のボールで支持されているだけなので、通常のガイドによる抵抗がなく、また上下左右にとどまらず斜め方向にも素早く動かせるメリットがある。

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