What is the working principle of the anti-shake function of SLR camera lens?

With the rapid development of photographic equipment, one advantage of SLR cameras is that they can shoot distant objects with telephoto lenses. However, one of the challenges will be to hold the camera steadily when shooting. In order to solve this problem, camera manufacturers have developed image stabilization technology and applied it to the lens. Camera lens anti-shake was originally a pocket camera with shock absorption technology introduced by Nikon 1994. 1995, Canon introduced the world's first lens EOS 75 ~ 300mm f/4 ~ 5.6IS with image stabilizer (IS is short for influence stabilizer system), which is also known as the' anti-shake system'. The secret of image anti-shake technology is to add a set of mirrors floating relative to the optical axis on the lens. When the front/rear lens group is fixed, the floating lens group can move up and down to offset the action of the photographer's hand. The principle is as follows: The micro gyroscope and accelerometer in the lens can detect the slight movement (jitter) of the lens, and they trigger the circuit to drive the floating lens group to move the same distance in the opposite direction to offset the jitter of the lens. In the video we see below, we removed the front lens group of Canon 18-55 lens, and we can clearly see the working process of the floating lens group: The article is from Beijing Photography School.