Traditional Culture Encyclopedia - Photography major - Does the wide angle on the camera have anything to do with panoramic shooting? What does wide angle mean? What are the benefits? Is it possible to take a panoramic view with a wide angle?
Does the wide angle on the camera have anything to do with panoramic shooting? What does wide angle mean? What are the benefits? Is it possible to take a panoramic view with a wide angle?
Optical image stabilization is to correct the "optical axis deviation" through the floating lens of the lens. The principle is that the tiny movement is detected by the gyroscope in the lens, and then the signal is transmitted to the microprocessor, and the processor immediately calculates the displacement to be compensated, and then the lens group is compensated according to the shaking direction and displacement of the lens, thus effectively overcoming the image blur caused by camera vibration. This anti-shake technology requires high lens design and manufacture, and the cost is relatively high. The effect of optical anti-shake function is quite obvious. Generally speaking, turning on this function can improve the shutter speed of 2-3 gears, so that hand-held shooting will not be blurred, and the effect is very obvious for novices. Especially in large zoom cameras, the effect is more obvious, because even the slightest jitter is very obvious in the case of larger zoom, and the demand for anti-shake function is even greater in the case of telephoto.
Electronic image stabilization:
Electronic anti-shake uses CCD offset to realize anti-shake. The principle is: firstly, put the CCD on a bracket that can move up, down, left and right, and then when the gyro sensor detects the jitter, it will process the parameters such as the direction, speed and movement amount of the jitter, and calculate the CCD movement amount that is enough to offset the jitter. Compared with optical anti-shake technology, CCD anti-shake technology effectively avoids the spherical aberration problem caused by compensation method, and also solves the volume limitation problem that plagues SLR lens replacement. There is also a high-sensitivity anti-shake in electronic anti-shake. Some portable digital cameras have high-sensitivity anti-shake. They support high ISO sensitivity setting (some models can be as high as 3200) and the function of automatically increasing ISO setting when the light is insufficient, thus ensuring higher shutter speed and being more suitable for "handheld shooting". But for any camera, the image taken under high ISO is not as good as that under low ISO. In order to offset this effect, high ISO system usually cooperates with advanced denoising technology to ensure the image quality.
Through the understanding of anti-shake function, we can know that the use of anti-shake function can effectively overcome the image blur caused by camera vibration, so that hand-held shooting will not be blurred. Of course, the anti-shake system will increase the battery consumption, but not much.
Generally speaking, if you shoot by hand, use an anti-shake device! Anti-shake is particularly useful when the telephoto end of some super-long lenses is used for telephoto or close-up of people. In addition, anti-shake can also play a role in some dark environments.
Super anti-shake refers to optical anti-shake and high-sensitivity double anti-shake, which makes the picture clearer and can effectively reduce the photo blur caused by camera shake or object movement. For example, the T20 sold by Sony is very suitable for beginners. Generally speaking, the effect of electronic image stabilization is not as good as that of optical image stabilization.
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