How does the lens magnification of a digital camera compare to the focal length of a traditional camera

It refers to the optical zoom of the lens. Due to the CCD area is different, resulting in the actual focal length of the lens and the equivalent focal length is different, now we are accustomed to the traditional 135 camera film specifications as a standard, is 36 * 24MM, this specification of the digital camera is called a full-frame camera, which is the same as the actual focal length and the equivalent focal length is the same, 1:1

If the CCD area is smaller than this is a non-full-frame machine, including the APSC Their equivalent focal lengths are larger than their actual focal lengths, and what their ratio is has to do with the ratio of their CCD area to the CCD area of the full frame camera.

So now start to answer your question:

1, the multiplier and the focal length has nothing to do with, it shows the focal length of the range of change, such as: 10MM-20MM lens, zoom multiplier is 2, 100MM-200MM lens, the multiplier is also 2. But their focal lengths are obviously different.

2, to see what the focal length of the camera, full-frame machine directly look at the lens markings.APSC DSLR cameras, generally Nikon's is the lens markings multiplied by 1.5, other brands multiplied by 1.6.Olin Bars multiplied by 2. And consumer-grade telephoto and card machines, equivalent focal lengths do not go to the conversion, it is difficult. Then you have to read the manual, which states what the equivalent focal length is. And you don't have to worry about the actual focal length.