How much can an optical zoom of 5x pull an object 100 meters away?

You can't calculate the magnification just by looking at it, because you don't know the focal length at the wide-angle end, and how much you zoom in has nothing to do with the magnification, such as Canon's 1200mm prime lens, which theoretically has an optical zoom of 1x, but you can see things from a few kilometers away.

Generally, the wide-angle end of a small digital is 35mm (equivalent to 135), and the wide-angle end of a wide-angle digital is about 28mm. Therefore, after 5 times the light change, it is about equal to the focal length of 140-175mm, which basically does not shine 100 meters away, and can probably illuminate the standing posture of a person about 10 meters.

The landlord has a misunderstanding about zoom. Optical zoom affects the size of the angle of view, and the zoom effect of different focal lengths on the "closer" of the angle of view is different.

For example, a 20 100mm lens is called 5x zoom, and a 200 1000mm lens is also called a 5x zoom, but the latter can zoom in on a person 100 meters away to a close-up, and the former still can't see people clearly.

If you have to ask how much it has been brought closer, it is 5 times closer, what else is there to say.

100 meters away, with the current 5x zoom DC on the market, it is possible"Pull"The ability to get close is very limited.

You can do an experiment on the moon and see how much difference the size of the shot is from what you actually see. The distance between the Moon and the Earth is much greater than 100 meters, and it is large enough. In fact,"Pull closer"It's just a visual concept.

To put it simply, the 12x optical zoom can pull the face from a meter away to a distance of about 2 meters in front of you.

This has nothing to do with the magnification of the optical zoom, but depends on the maximum focal length, the longer the focal length, the greater the magnification of the image on the captured image, and the closer the distant object will feel after magnification.

1. Generally, 10x zoom can take close-up shots of people within 50 meters, and handheld shooting is basically uncontrollable after more than 10x....

2. The meaning of optical zoom is simply put.

If you are 10 meters away from the subject, then 1 times is 10 meters of visual effect, and 2 times is 5 meters away.

3 times is meter away vision.

4 times is the vision of meters away.

Analogy 3: The zoom of the lens has nothing to do with the shooting distance, but with the field of view (shooting angle).

Zoom is relative to fixed focus, and the so-called ability to zoom objects a few meters closer is actually the concept of viewing angle: the wide-angle type has a large viewing angle, which can fit more images at the same distance, because the objects in the picture will be smaller; On the contrary, the telephoto class has a narrow angle of view, so it can only include a part of the object in front of the camera, and from our visual point of view, it is "closer".

The specific focal length of each camera is not the same, depending on the specific model, but the focal length of the DC of the general fixed focus class is relatively small, belonging to the wide-angle class, and the ability to "zoom in" is very limited In fact, it is not close at all, but "farther away". Generally, DCs with large optical zoom have a stronger ability to zoom in.

It has nothing to do with the meter It is a multiple of the focal length,In fact, the simpler the understanding of the multiple, the closer the distance can be narrowed,If you buy a card, it is not recommended to be too high a multiple,It doesn't make much sense to drop the optical quality,10 is enough。