The 12x optical zoom of a digital camera is equivalent to the focal length of a conventional camera

It depends on the area and lens of the CCD CMOS, which is generally said on the lens or in the manual!

The camera's optical zoom means that the lens movement is used to zoom in and out of the scene to be photographed, and the larger the optical zoom ratio, the farther the scene can be photographed. The higher the multiplier, the better.

The optical zoom method of digital cameras is similar to that of traditional 35mm cameras;

It is to zoom in and out of the scene to be photographed by moving the lens, and the larger the optical zoom ratio, the farther the scene can be photographed;

Some digital cameras with longer lenses have more room to move the lenses and sensors inside, so the zoom factor is also larger;

We see some ultra-thin digital cameras on the market, which generally do not have optical zoom function, because the inner root of their body does not allow the movement of the image sensor;

Digital cameras like Sony F828 and Fujifilm S7000 have optical zoom functions that reach doubles;

Most of today's digital cameras have optical zoom ratios between 2x and 5x, which can bring objects from 10 meters away to 5-3 meters; There are also some digital cameras that boast a 10x optical zoom effect.

How to choose a digital camera:

First of all, make sure that you can accept it**, if it is below 1500, there is nothing to provoke, entry-level, the manufacturer can save in terms of function and configuration, it is almost the same. 1500-2000 yuan, there is a difference.

Pick of pixels:

Don't think about this, unless you want to wash more than 30 inches. 5 million pixels can already be washed out to the size of A4 paper. Now the lowest digital camera on the market is 7 million, which is enough.

Selection of CCD:

This is to look at the parameters, under the premise of the same pixels, the larger the size of the CCD, the better, the CCD is generally 1, the better is 1, 1 is very good.

Optical zoom: three times in general, enough for home use. If you like to shoot long-distance scenes, there are 6 times, 7 times, 10 times, 12 times, and 20 times in the telephoto finger machine. Of course, the higher the multiplier, the higher the **.

Display: The size of the display depends on personal preferences, the bigger it is, the cooler it looks, but the more power it consumes, and the higher it is. There is a certain gap between the display results of the display screen and **, because the display screen is only a temporary imaging.

The lens of a DSLR camera does not look at the zoom factor, but at the focal length. It can be roughly divided into the following types:

The first is a wide-angle lens.

Traditionally, a wide-angle lens is a lens with a focal length of less than 35mm, such as a 28mm, 24mm, or even 16mm lens. Lenses below 24mm are called ultra-wide-angle lenses.

The second type is the standard lens.

The focal length is 50mm or 85mm, and the angle of view of the 50mm lens is closest to the human eye, so it is called the "header". But because of this, it is difficult to use the header well, because unlike ultra-wide-angle or macro lenses, which can shoot images that cannot be felt by the human eye. The 85mm lens is generally a portrait lens.

The third type is a medium telephoto lens.

It is 100mm or 135mm, where the 100mm lens is generally a macro lens, and the 135mm lens is also a portrait lens, but it focuses on half-length portraits, while 85mm focuses more on full-body portraits.

The fourth type of focal length above 200mm is what we call a telephoto lens.

In fact, this focal length lens is quite versatile, and can be used to shoot landscapes, portraits, or ecological photography (such as shooting birds, etc., especially lenses of 300mm or even 400mm). However, these lenses are usually large and heavy, and they lack the help of stabilization, so there are still a lot of limitations in their use, so there are not many opportunities to actually use them.

The 10x optical zoom is equivalent to the 500mm focal length of the 135 camera, which is considered a super telephoto. Clear images can be taken at a distance of about 150 meters. However, this distance requires a high level of camera shutter and aperture.

The 10x hybrid optical zoom technology can achieve focal length coverage equivalent from 16mm to 160mm, which is done by the cooperation of 3 lenses with different divisions.

The 10x hybrid optical zoom technique enables the equivalent focal length coverage of 16mm to 160mm, which is achieved by the cooperation of 3 lenses with different divisions of labor.

The English name of optical zoom is opticalzoom, and the digital camera relies on the optical lens structure to achieve zoom. The optical zoom method of digital camcorder is similar to that of traditional 35mm cameras, that is, the lens movement is used to zoom in and out of the scene to be photographed, and the larger the optical zoom factor, the farther the scene can be captured.

Optical zoom is created by a change in the position of the lens, object, and focal point. As the imaging surface moves horizontally, the angle of view and focal length change, and the farther scenery becomes clearer, giving the impression that the object is progressing. Obviously, there must be two ways to change the angle of view, one is to change the focal length of the lens.

In photographic parlance, this is optical zoom. The focal length of the lens is changed by changing the relative position of the lenses in the zoom lens. The other is digital zoom.