It is suggested that you'd better know it very well before buying something, and this will help you get a good buy and save you unnecessary money. Here we will talk about something basic you need to know before buying the backup camera. When you install a backup camera system, the clarity and realism of reversing images will have a great influence on the safety of reversing or parking. But how do choose a backup camera with a high clarity and realism? Do this, at least, you need to know following two points: camera chip and camera lens.
Backup camera Chip. The chips for car rearview cameras are usually divided into two classes: CCD chip and CMOS chip. The former is usually used in high-grade digital cameras and video cameras as it has a good imaging efficacy and a higher color restoration coefficient, and the images it produces is more clearer. When it comes to its drawback, this type of chip is usually a little larger, high power consumption and more expensive. However, these drawbacks of the CCD chips is just the advantages of the CMOS chips.
With the rapid development of CMOS technology, CMOS chips are getting better and better, some even replace the CCD chip and get used in top-end professional cameras. The CCD sensor is slightly better than the CMOS sensor in terms of sensitivity, resolution and noise controlling, while the CMOS has the features of low-cost, low power consumption and high integration. In fact, along with the continual progress of CCD and CMOS sensor technology, the difference between these two chips is negligible.
Therefore, when you are choosing a backup camera, don't only focus whether it adopts the CCD sensor. Nowadays, some CMOS cameras have been also added many image control technologies such as light and image automatic gain reinforcement, automatic brightness adjustment, white balance control, auto saturation and contrast adjust and so on, and such CMOS cameras can be completely comparable with the CCD camera.
The next is the camera lens. The backup camera lens is usually composed of glass or plastic. The plastic lens is very cheap, but its imaging effect is obviously inferior to the glass one. A little better camera usually adopts four layers of glass lenses(4G). There are also 5G camera lens, which, in fact, is added a layer of iris or a piece of light filter in order to increase the light-filtering properties.
Usually, different 4G camera lens also varies in quality, price, imaging effect, you can simply make a judgement by the luminous flux, which is expressed by f value. The smaller the f value, the better the camera lens. You also need to check whether the camera lens will appear blurry image. Nowadays, many small factories usually reduce the number of lenses, or use cheap plastic lens in order to save costs and pursue high profits. Though these products is much cheaper and look very attractive, the actual imaging effect really can not be complimented any more. When purchase a backup camera, don't always covet of the bargain, you'd better choose the camera lenses of high quality whenever possible!
In addition above two aspects, choosing a good backup camera also requires you learn about other more things, such as its night vision effect, waterproof function, video system, resolution and so on. These will be discussed detailed in next article! Hope that this will help you a lot! Want to get more choice of backup cameras, maybe you can refer to autodvdgps.com!