Why is the image still blurred after I turn on anti-shake?

Anti-shake is not everything. When we talk about anti-shake technology, we often use the phrase "the X file of the safety shutter can be reduced". Generally speaking, the safety shutter is the reciprocal of the focal length of the lens. For example, the focal length of 180mm (calculated by the equivalent focal length of 135) is1180s, and so is the 35mm lens. In the hand-held case, below this safety shutter, the image may be blurred. The addition of anti-shake technology can reduce the limit of this safety shutter. For example, for the same lens with a focal length of 180mm, the hand-held camera can shoot at the shutter speed of 1/90s after using the anti-shake technology that can reduce the four-level safety shutter, and the image is not empty. But if the light is dim to the shutter speed of 1/30s or lower, it will still be.

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