Incorrect color rendition on the monitor when reverse gear is turned on often indicates poor quality of the matrix or incorrect setting of the NTSC/PAL color system. It is this parameter that you should pay attention to first, since cheap sensors are not able to convey a real picture of what is happening behind the car, especially in poor lighting conditions. Rear view camera rating is determined not only by price, but also by pixel reliability, vibration resistance and the ability of the matrix to operate at extreme temperatures.
Choosing a parking device is always a compromise between cost and image quality. If you plan to use the multimedia system for navigation and video viewing, then the matrix resolution becomes a critical safety factor. In this review, we will analyze the technical characteristics of popular models to help you avoid buying illiquid equipment.
Criteria for selecting a quality review systemWhen evaluating the technical characteristics of a device, the type of matrix used is of paramount importance. Modern CCD sensors provide better color rendering and performance in the dark compared to budget ones CMOS analogues. However, progress does not stand still, and new generations of CMOS matrices have already caught up with the leaders in the quality of night photography, while remaining more energy efficient.
⚠️ Attention: when choosing, pay attention to the video signal standard. Incompatibility of standards NTSC and PAL between the camera and the head unit will result in a black and white image or no image at all.
NTSC and PAL between the camera and the head unit will result in a black and white image or no image at all.Viewing angle is the second most important parameter affecting the safety of maneuvering. The optimal range is considered to be from 120 to 170 degrees diagonally. Too wide an angle can create a fish-eye effect, distorting the distance to objects, while a narrow angle leaves blind spots on the sides of the bumper.
- 📷 Matrix type: CCD provides the best quality, CMOS provides an affordable price.
- 🌙 IR illumination: necessary for complete darkness, but can be blinding up close.
- 💧 Protection class: minimum standard
IP67orIP68for the street.
Specifications: CCD vs CMOSThe difference between sensor manufacturing technologies determines the final cost and image quality. Matrices CCD traditionally considered the standard for automotive optics due to their high photosensitivity and low noise level. This allows the camera to clearly see objects even under headlights or street lights, without turning the image into a mess of colored spots.
In turn, technology CMOS has long been associated with poor quality, but modern models such as the Sony IMX series deliver superior results. The main advantage of such solutions is low power consumption and less heating, which extends the life of electronics in hot weather.
Technical nuances of signal transmission
When transmitting a video signal over twisted pair cable using adapters, the quality may decrease. For distances greater than 10 meters, it is recommended to use 75 ohm coaxial cable to avoid loss of image detail.
It's important to consider dynamic range when making comparisons. A good camera should be able to simultaneously see the bright headlights of a car behind you and the dark corners of a parking space. If the sensor cannot cope with changes in brightness, you risk not noticing a pedestrian in the shadows.
TOP manufacturers of automotive opticsFor many years, brands specializing in automotive electronics have remained market leaders. Company RedPower offers a wide range of models adapted to specific car brands, which simplifies installation without drilling the body. Their products are often equipped with high-quality CCD matrices of the latest generation.
Brand Sho-Me has established itself as a provider of reliable budget solutions. Their cameras are distinguished by their simple design and good maintainability. For standard parking tasks in urban environments, their technical characteristics are often redundant, which makes the purchase economically justified.
The third position on our list is occupied by the company Avis Electronics. They specialize in premium, high-resolution solutions with additional features such as dynamic parking line markings. The products of this brand are often used in installations for business class cars.
Comparison table of popular modelsTo simplify the choice, we have systematized data on the key parameters of running models. The table shows average characteristics relevant for the current model year.
| Model | Matrix type | Viewing angle | Resolution | Protection |
|---|---|---|---|---|
| RedPower CAM-018 | CCD Sony | 170° | 720p | IP68 |
| Sho-Me CA-2018 | CMOS | 140° | 480p | IP67 |
| Avis AVS320 | CCD AHD | 150° | 1080p | IP69K |
| ParkCity DVR HD | CMOS | 120° | 720p | IP66 |
Analyzing the data, you can notice a direct correlation between the type of matrix and the final price of the device. Models with resolution 1080p require a more powerful head unit for signal processing, which should also be taken into account when upgrading the car.
The main conclusion: for night parking without additional lighting, choose only CCD matrices; during the day, high-quality CMOS is sufficient.
Installation and connection featuresInstalling a rear view camera requires attention to the details of the vehicle's electrical wiring. The first step is always to find the power point, most often the reverse light wire. Usage multimeter allows you to accurately determine the positive contact when engaging the gear.
☑️ Checklist before installation
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☑️ Checklist before installation
The cable must be laid through the standard rubber corrugations of doors and thresholds.
⚠️ Attention: Never lay the video cable parallel to high-voltage wire harnesses or audio system power cables, this will create severe interference in the image.To protect the signal, ferrite rings are often used at the ends of the cable.
The camera itself must be mounted rigidly to prevent vibrations that could cause the lens to become out of focus. If the camera is mortise, the hole in the body must be treated with anti-corrosion agent. Universal models often require drilling, which may void your paint warranty.
Image problems and solutionsDuring operation, owners may encounter ripples on the screen or periodic loss of signal. Most often, the reason lies in poor ground contact or oxidation of the connectors in the trunk. Checking and cleaning the contacts usually solves the problem of unstable operation.
If the image has a pink or greenish tint, you need to check the color coding settings in the head unit menu. Switching between systems Auto, NTSC and PAL often returns natural colors. In some cases, it is necessary to replace the video cable with a more shielded analogue.
Helpful advice: if the camera only works when the engine is running, but goes out when the starter starts, it means there is not enough voltage. Install an additional capacitor in the camera's power circuit.
Finally, fogging of the lens from the inside indicates a violation of the seal of the housing. Such a device must be replaced or urgently sealed, as moisture will quickly damage the electronics. Remember that the IP67 protection class only guarantees operation under short-term immersion, and not under constant water pressure in a sink.
Why does the camera show an upside-down image?
Some models have mirror (Mirror) and reversal (Flip) functions. If the image is flipped vertically or horizontally, check the instructions for your specific model. Often there is a loop in the wire, cutting which changes the orientation of the picture.
Can I connect the camera to an Android tablet?
Yes, but you will need a special USB video capture device (TV Tuner) that supports the analog video standard, since the built-in cameras in tablets do not have an input for an external signal. Digital AHD cameras require more sophisticated decoders.
How to increase the viewing angle without replacing the camera?
It is impossible to physically increase the angle, but you can use special convex mirrors on the lens, although this will greatly distort the image. Software angle expansion in cheap models leads to a loss of resolution at the edges of the frame.