October 2009
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5 tips to learn more about Image Stabilization (contd..)

Tip 386 (No need for Image Stabilization when using a tripod or normal shooting): Although the treatment for using Image Stabilization varies from camera to camera, there is pretty much agreement that Image Stabilization is useful when there is a need for it, but one should turn it off when the conditions do not require Image Stabilization. So, for example, when you use a tripod, you have no need for using Image Stabilization since there will be no blurring because of movement of the camera, and you should turn off Image Stabilization.

Tip 387 (Types of Image Stabilization): There are essentially 3 different types of Image stabilization, with 2 of them being based on either the lens or the camera, and the third one being based on using software (but this is meant for videos, not images, so we will not discuss this further)

Tip 388 (Optical Image stabilization): Already described in an earlier tip, Optical Image Stabilization is for the case when the path that the image takes to get to the sensor is varied. This ensures that the optimization is built inside the lens rather than in the camera body (and moving this optimization out of the camera body means that the camera body is less complex, and lighter). Optical Image Stabilization is done by ensuring that the lens has sensors inside that can capture movement, and accordingly move the lens elements to counter the effects of the shake.

Tip 389 (Sensor-shift image stabilization): This is a process in which the sensor that captures the image moves in a way to counteract the effect of the movement, so that the blur gets cancelled. This technique is also known as mechanical image stabilization. One advantage of this approach is that there is no more dependency on the lens for ensuring that stabilization occurs.

Tip 390 (Zooms increase effect of blur): As the amount of zoom increases, the effect of a blur is magnified. So, as you do a higher level of zoom, the chance of increasing the blur and the effect of shake increases. Usage of Image Stabilization becomes more important as you increase the zoom.

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