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在镜头中,焦距在80mm至300mm区域内的,被称为长焦镜头,选购时宜关注以下两要素。(1)查看最大光圈值焦距越长,对快门速度要求就越高。如果当您使用一款长焦端432mm数码相机的时候,其安全快门就要在1/400s左右了。低于这个,可能就会拍出模糊的照片。因此,在选购长焦数码相机的时候,重点看一下此机器在长焦端的最大光圈值,如果该机配备了光学防抖系统就更佳了。(2)注意相机长焦端的对焦速度和精度当您
In the lens, the focal length in the 80mm to 300mm region, known as the telephoto lens, the purchase should pay attention to the following two elements. (1) Check the maximum aperture value The longer the focal length, the higher the shutter speed requirement. If you use a telephoto end when the 432mm digital camera, the safety shutter will have about 1 / 400s. Below this, it may be blown pictures. Therefore, the choice of telephoto digital camera, focus on the machine at the telephoto end of the maximum aperture value, if the machine is equipped with optical image stabilization system even better. (2) Note the focusing speed and accuracy of the telephoto end of the camera when you are