How to choose a surveillance camera. camera characteristics
A camera is a device that converts the luminous flux into a standard signal, which is then transmitted to signal processing devices (monitors, recording devices, etc.).
The main characteristics of surveillance cameras:
Resolution (TVL) is a parameter that characterizes the detail of the image, in a word, the higher the resolution, the better small details are seen, such as a car number, a person’s face. It is measured in television lines (TVL), meaning the horizontal resolution, since the vertical resolution of cameras of the same standard is the same and is limited at one level. Standard-definition black-and-white cameras have a resolution of 380-420 TVL, higher resolution 560-570 TVL, color cameras 280-350 TVL, high-resolution up to 460 TVL, and with digital signal processing (DSP) up to 560 TVL.
Analog camera television standards:
Sensitivity (lux). the minimum illumination level (in lux) at which the camera gives a recognizable signal. The smaller the parameter, the less light the camera needs to produce an acceptable picture. For conventional black and white cameras, it is 0.4
0.01 lux (twilight), for highly sensitive to 0.00015 lux (dark night), for color 0.2
It is worth mentioning that the sensitivity of black and white cameras affects not only the visible light spectrum, but the infrared region, which allows the use of IR illumination in low light conditions.
Estimated illumination of objects.
Size of the matrix. the main element of the surveillance camera is the CCD. the matrix is a set of cells capable of transmitting information in the light. Matrix size is measured diagonally in inches. When choosing a camera, keep in mind that the larger the matrix, the larger the camera, but the matrix size does not affect the image quality. The most common cameras with a matrix size 1/2 “, 1/3”, 1/4 “.
Camera angle of view. a parameter that is determined by the focal length (f) of the lens. Often this parameter is indicated in degrees. Small focal lengths (2.8-5.0 mm) correspond to a wide viewing angle. To observe distant objects, lenses with a long focal length (28.0. 75.0 mm and more) are used. Having a lens with a wide viewing angle, you can get a good panoramic view (general picture), but in the distance you will see worse, smaller, and you will no longer be able to see some small details there. And when using long-focus lenses, of course, the field of view narrows, but you will see better into the distance.
Choosing a camera angle
The first thing to consider is that cameras are somewhat different from the human eye. Your eye is NOT perfect, but a good enough surveillance system. You can as well look into the distance, even to the horizon, and distinguish the lines on your hand. With a simple turn of your head, you can see what is happening here or to your left. The camera looks straight (if it is NOT a controlled camera) at that distance and with that angle, which allows the focal length of the lens. For this reason, the choice of focal length is one of the most important points in the selection of equIPment for the surveillance system. If you are choosing lenses with a fixed focal length, pay special attention to this! In addition to lenses with a fixed focal length, there are lenses with variable (varifocal). Varifocal lenses allow you to adjust the visible image directly on the object, in addition, in the future you have the ability to change the angle of view. But only in a preselected range. For a more convenient lens selection, below is an approximate table of viewing angles and distances from the camera to the object.
Viewing angles and distances from the camera to the object:
viewing angle, for
1/3 CCD “
|2.8 mm||86||up to 19 m||up to 1.4 m.||–|
|2.9 mm||83||up to 20 m.||To 1.45 m.||–|
|3.6 mm||72||up to 25 m.||Up to 1.8 m.||–|
|4.0 mm||67||up to 28 m.||Up to 2 m.||Up to 2.6 m.|
|6.0 mm||48||up to 42 m.||Up to 3 m.||Up to 4 m.|
|8.0 mm||36||up to 56 m.||Up to 4 m.||Up to 5 m.|
|9.0 mm||thirty||up to 63 m.||Up to 4.5 m.||Up to 6 m.|
|12.0 mm||25||up to 84 m.||Up to 6 m.||Up to 8 m.|
|16.0 mm||17||up to 112 m.||Up to 8 m.||Up to 10 m.|
|25.0 mm||12||up to 175 m.||Up to 12.5 m.||Up to 16 m.|
|50.0 mm||6||up to 350 m.||Up to 25 m.||Up to 33 m.|
|80.0 mm||3.3||up to 560 m.||Up to 40 m.||Up to 53 m.|
|100.0 mm||2.8||up to 700 m.||Up to 50 m.||Up to 66 m.|
|120.0 mm||2.1||up to 840 m.||Up to 60 m.||Up to 80 m.|
For cameras with 1/2 matrix size “, the viewing angle will be about 17-18% larger, and for 1/4 matrixes. less.
It is also worth noting that the angle of view indicated by camera manufacturers is usually presented not horizontally, but diagonally.
Here is a good example of using lenses with different focal lengths:
Color or black and white?
This question should be asked first when designing a surveillance system. Black-and-white cameras have a higher sensitivity, resolution, allow observing an object in infrared (invisible to the eye) radiation, and have a lower cost. The main disadvantage of a black and white camera is that it is impossible to determine the color of an object. For example, a blue and yellow car on the monitor screen will look exactly the same. gray.
Color cameras allow you to more accurately identify the subject of observation, such as casino chIPs, bills, cars, clothes, items, etc. The disadvantage is the higher cost, the inability to get a quality image in the dark, although some color cameras (more expensive) have a day / night mode, i.e. Camera in low light starts to work in black and white.
Some of the camera options and features that can dramatically improve image quality in difficult visibility conditions:
|A camera with a lens equIPped with an auto iris (ARD), or a camera that allows the installation of a similar lens. The princIPle of operation of an auto iris lens is the same as that of our eyes. At high light intensities, the diaphragm narrows, at low light intensities, it expands. It should be borne in mind that the sharpness settings for such a lens should be carried out: with a fully open aperture at minimum illumination (dense twilight, night) or Using neutral light filters to reduce the overall flux intensity.|
|One of the advantages of cameras over the human eye is that cameras can look in infrared lighting (IR). For this, special infrared illuminators (IR illumination) with built-in IR diodes are used. It is important to know that color cameras cannot work in conjunction with separately installed (not built into the camera) IR. illumination. To work with IR illumination, we recommend using black and white cameras or day / night cameras with a mechanical removable IR filter (ICR) or electronic mode (mechanical is better). As an advantage of IR illumination, it is worth noting that the camera can see in absolute darkness, as a disadvantage. the image will be somewhat unnatural. In addition, the power consumption of these devices is quite high. And the further the IR illuminates, the higher the consumption.|
|Day / Night (D / N). The princIPle of operation of cameras with this capability is quite simple. With sufficient illumination, the image is colored, with insufficient illumination, it is black and white (with increasing sensitivity). There are two main types of day / night. Electronic. in low light, the camera turns off the color and that’s it. And the only positive result from such an action, color interference disappears. Mechanical (ICR). in low light conditions, the camera mechanically shifts the IR filter, which allows more light to enter the CCD, thereby increasing the sensitivity of the camera.|
|Cameras equIPped with a mechanical infrared filter (ICR) In low light conditions, the camera mechanically shifts the light filter, which allows the CCD to perceive information in the near infrared spectrum, thereby increasing the sensitivity of the camera. For such cameras, it is recommended to select lenses with IR correction.|
|The noise filtering aLGorithm is based on comparing adjacent frames, detecting noise and neutralizing it (filtering). The main purpose of DNR is to obtain images without noise in low light conditions. In turn, a more complex but also more efficient 3D-DNR aLGorithm was created. Unlike previous versions of DNR, each frame is processed not once, but several times, which allows you to get a frame of higher quality. I would also like to clarify that with a decrease in noise, the file size in the archive (during recording) decreases. Savings can be up to 40% with JPEG and up to 70% with MPEG.|
WDR (Wide Dynamic Range) mode with high dynamic range. Thanks to this mode, the image received from the camera looks more saturated and color-balanced. If the field of view has bright and dark areas or too bright background, a camera with the WDR function will be the best solution for the subject of observation. Example use: you are observing a person against a light background. Without any processing, you have a light picture and the dark outline of the person, as if you saw him against the setting sun. Nice. yes, informative. comments.
The next generation of processing is the so-called BLC (Back Light Compensation). In this case, the camera detects image flare and decides to compensate for it. As a result, we distinguish a person, but do not see what is happening behind him. In the case of using a camera with WDR mode, you can distinguish Not only the person, but also what happens next. It does this by combining the same image taken in two different modes.
Sens-Up mode, which allows you to significantly increase the sensitivity of the camera in an emergency situation. This mode is not used in the normal observation mode. Application example: You have enough lighting on site to use cameras without additional functions. But someone broke the lantern, and there is no way to replace it at the moment. There are two options: you see a black screen in front of you, as there is not enough lighting for the camera, or in front of you, a very good (in the complete absence of lighting) image. The increase in sensitivity occurs due to the accumulation of charge on the sensitive elements of the CCD matrix with a slow shutter speed and further processing.
Other technical terms:
|DIS (Digital Image Stabilization) is a technology that allows the surveillance camera to operate in vibration. A surveillance camera, for example in manufacturing, is very often subject to vibration, resulting in a blurry image. This feature prevents, or as much as possible, Reduces the problem.|
|OSD. menu (On Screen Display). The fact is that at the factory, the parameters of the cameras are adjusted to the middle (optimal) position. But since on many objects the average parameters are NOT|
ideal, then when using cameras with OSD. menus, you can configure the camera to suit your conditions. In addition to the basic parameters (brightness, contrast, clarity, day / night, color, setting
shutter mode, AGC, BLC, etc.) in the menu there are additional settings (motion detection, name cameras, setting up hidden zones, etc.). Attention: if using the menu you have configured
the camera so that the image becomes unacceptable, use the Reset setting (reset manual settings and go to factory settings.)
Types of surveillance cameras
|Modular surveillance camera|
They are, as a rule, the size of a matchbox, are supplied by the manufacturer without a case and can be mounted in any interior items of a room that is protected by a surveillance system. In princIPle, almost any surveillance camera is based on such a module. Whether it’s a standard camera, dome, outdoor, zoom lens. if you disassemble it, you will find such a module inside.
Cylindrical (finger-type) surveillance camera
Surveillance cameras Minicylinder is perhaps the most common of the inexpensive, but at the same time high-quality cameras. They are distinguished by their diminutiveness, reliability, good parameters and a more favorable price.
Dome surveillance camera
Usually they are hemispheres installed on the ceiling in the room. As a rule, this is a plastic case with a modular (uncased) camera built inside.
The camera is made in a special case for installing and simulating a peephole. As a rule, they have a very wide viewing angle. up to 180 degrees, which makes the image very distorted, and the picture on the screen almost round. However, this is the same as in a regular door peephole.
For hidden installation (pin-hall) surveillance camera
Pin-hall cameras are distinguished by the smallest dimensions and are used for covert surveillance. They can be of different designs, the most important thing here is a lens (this is called a pin-hall). Currently, such lenses are prohibited for import and free sale on the territory of the Russian Federation, however, many craftsmen continue to actively use them (not quite officially).
Anti-vandal surveillance cameras
Cameras with anti-vandal housings are ideal for surveillance systems that are installed in crowded areas. As a rule, anti-vandal cameras are outdoor and therefore suitable for use in various climatic conditions. Most of the anti-vandal cameras are made in the form of a dome or a hemisphere, since this shape protects the camera as much as possible from all sides. The body of the dome vandal-proof cameras is made of impact of durable metal, it allows the camera to be resistant to external influences. Such cameras can even withstand a hammer blow to the body. Anti-vandal cameras Recommended for use as part of a surveillance system for residential buildings, office centers, parking lots, stadiums, museums and other public places of objects.
Outdoor surveillance cameras
Any camera installed in a Suitable heated enclosure, or a special camera originally assembled as suitable for outdoor use.
Box-type surveillance cameras
A separate device that can be used in various conditions, both indoors and when using heated housings outdoors. This camera requires a lens to function. Another name is standard cameras. Usually sold without a lens.
PTZ cameras or high-speed, robotic, PTZ surveillance cameras
PTZ cameras are available for outdoor and indoor use, which adds to their versatility. The peculiarity of THESE cameras is that they can be controlled. In addition to the camera itself, you will need some kind of control, it can be a program on a computer and a special remote control with a joystick. PTZ cameras are also all different, they start with simple zoom lenses. a camera where only the lens can be remotely controlled and the internal menu is followed by PTZ cameras. they add the possibility of small turns of the lens or the entire camera (
30 degrees), then high-speed, swivel akamers. They already have the ability to rotate all 360 degrees. Horizontal and at least 170 g Vertically.
Dummy surveillance camera
Camera operating conditions
When operating the camera indoors, you only need to think about how the installed cameras will fit into the interior of the room and what picture will come out of them. It is necessary to determine where the camera needs to be installed hidden, and where in special decorative covers. In any case, it is necessary to strive to ensure that the installed television cameras DO NOT distract employees from their work, and the residents of the house are not constrained in their actions.
It’s another matter if the camera is to be installed outdoors. And a street in Russian conditions means large temperature fluctuations from 40 to 50 C, high humidity, large fluctuations in illumination. Do not forget the possibility of physical destruction or even theft of the camera itself.
To compensate for the harsh climatic conditions on the street, which are beyond the boundaries of the camera’s operability, special climatic housings (thermal casing or hermetic casing).
To protect the camera from vandalism, special casings are used made of high-strength alloys with armored glass. Such housings can also contain the desired thermal devices.
type of instalation
Concealed or conventional installation. For covert surveillance, miniature frameless cameras with a lens diameter of 1-2 mm (the so-called pinhole lenses) are used, which can be installed in walls, entrance doors, and interior items. These cameras are completely invisible to the prying eyes and are protected from vandalism. They can be camouflaged as fire or infrared sensors. At the moment, the hidden installation of surveillance cameras is prohibited by Russian law. In the case when there is no need to conceal the fact of observation, ordinary corpus or unpackaged surveillance cameras are used.
Analog and network (IP) surveillance cameras
According to the method of signal transmission, surveillance cameras are divided into two groups: analog and network. Analog cameras transmit the signal over a coaxial cable and connect to the surveillance system over a BNC connector. Some of them are equIPped with a built-in twisted pair or fiber optic transmitter. this allows signal transmission over long distances without intermediate amplifiers.
IP cameras Not only generate the signal, but also digitize it. Although it would be more accurate to say, it DOES NOT decimal, i.e. The electronic image obtained from the matrix remains digital, it is only processed and compressed (in MPEG-4, M-JPEG, H.264, etc.) and transmitted over LAN / WAN via the Ethernet network port. Since IP surveillance cameras usually have a built-in web server, they can be viewed in a standard web browser (Internet Explorer). The image quality provided by the first digital cameras left much to be desired, and the range included only stationary color TV cameras, so many installers preferred to use analog cameras connected through servers. Currently, for almost any analog camera, you can find a full replacement from the group of IP cameras.
We will tell you all about the choice of home appliances
Shooting quality. Dimensions and weight
Do not forget about these parameters. For hiking enthusiasts, heavy professional specimens are hardly suitable. Here, rather, it is worth giving preference to miniature models, which are presented in a wide range on the market. On the contrary, when it comes to home filming, it is better to prefer weighty copies, which will be comfortable to hold in your hands. Ergonomics always comes first in private home use.
Before proceeding to review camera characteristics, you should definitely look at their type. In fact, there are a huge number of them.
1. Minidv. it universal camera, which appeared on the market for a long time. This version of the device is characterized by high image quality and a huge variety of possibilities. However, in recent years, camera manufacturers have almost completely eliminated such models from their lines.
2. Action. These are the smallest representatives of the family of such devices. They are lightweight, so extreme sportsmen are actively used. Otherwise, for the most part, such devices are quite mediocre. They are not suitable for everyday use, since their small weight does not allow them to be held stably in the hand. This leads to constant image shake.
3. DVD. This option is also gradually becoming a thing of the past. Such reliable cameras equIPped with a DVD burner. The advantage is the fact that you can immediately preview after shooting, insert the DVD into your computer’s drive or player. There are many disadvantages. The most important is that you can record for a limited amount of time. 30 minutes is the maximum that a person can count on.
4. 3D cameras. Today you will NOT surprise anyone with a TV with a 3D function, but what do you say when it comes to a camera? Yes, there are such copies on the market. They have two matrices. In fact, the princIPle of operation is exactly the same as in 3D TVs. A great solution for a modern family, but very expensive.
5. AVCHD. Today they are exactly quality cameras have become real market leaders. This is NOT strange, as they are capable of shooting up to several hours in high definition format. Such a long shooting time is associated with the possibility of installing memory cards of various sizes into the device. Just Install a flash drive with the volume you need, and start shooting in high definition.
Number of pixels
Now you can smoothly move on to considering the main camera characteristics. We’ll start today with the number of pixels. This parameter directly depends on the matrix that is installed on the device. The pattern is simple. the more pixels there are, the better the image will be. Try to get copies that are capable of shooting in high definition.
How to choose a camera 2017-2018. Sensitivity
Another very important characteristic. Many argue that the lower this parameter, the better. In fact, it all depends on the level of brightness and noise at which measurements were made. To our great regret, this can only be determined empirically.
How to choose a camera
Camera manufacturers offer us to purchase a huge number of models. The market is simply overflowing with the products of certain companies. Among the leaders in this segment are brands such as Sony, PanaSonyk and Samsung. Their products have long established themselves from the best side, so pay attention to them, please.
How legal is it to install a covert surveillance system?
Installing a covert surveillance system for an apartment or house is absolutely legal. However, the presence of such equIPment should be reported to all household members, potential visitors and guests. In this case, one cannot but indicate its location. Otherwise, when using surveillance against the will of a person, he can go to court.
There are cases when the legality of covert surveillance fades into the background. For example, it might involve observing babysitting behavior. If a person commits a crime, which is captured on a hidden camera and presented in court, she, according to the law, will be severely punished, and a counterclaim that the nanny was not notified of the shooting will be ignored.
According to the legislation of the Russian Federation, the use of portable cameras, which are presented in the form of household items, is prohibited, which implies the issuance of penalties. Buying, selling spy mini cameras and covert information acquisition are punishable by up to four years in prison in accordance with Art. 138 of the Criminal Code of the Russian Federation.
Areas of use of mini cameras for covert surveillance
Miniature covert surveillance cameras are characterized by a wide range of applications. They are often installed in offices to carry out secret constant control over personnel, so that such a procedure does not have a negative impact on performance and employees do NOT complex.
Installation of covert surveillance is also justified in a home where hired personnel, for example, a nanny or a housekeeper, work. Conventional cameras will psychologically traumatize workers who are capable of harboring evil and resentment, which may negatively affect Subsequently.
Hidden cameras are installed in offices to carry out secret constant monitoring of staff
Miniature cameras are also indispensable for recording business meetings and negotiations, as they allow you to save important information. This is especially valuable if they are held confidentially for some reason. They are often used to record seminars, lectures, press conferences for the purpose of further careful study of the material. Mini cameras are justified for capturing events during an investigation. Small devices can be used for general shooting if quality requirements are NOT too high.
What to look for when choosing a hidden mini surveillance camera
When choosing a camera for covert surveillance, you should pay attention to such device parameters as the quality of shooting, angle of view, sensitivity and resolution.
The supersensitive element is located on CCD devices, so that the matrix can reproduce a color image even at the lowest light level. Many current camera models automatically switch to monochrome at zero light, which provides a better picture.
The resolution of the surveillance camera should be selected as high as possible.
Small surveillance cameras have different viewing angles. They can be divided into telephoto and wide-angle. The first option is currently used extremely rarely, since such models differ in the minimum viewing angle. This parameter is determined by the focal length, which in mini cameras is in the range of 2.7-3.6 mm. These values correspond to a viewing angle of 60-90 degrees.
When choosing a device, the sensitivity and resolution of the camera are of no small importance. The latter parameter can vary between 1.3-12 megapixels. Enough for home surveillance cameras with 2MP resolution. Devices with the maximum value of this parameter have a number of disadvantages, one of which is the recording frequency, which is only 10-15 fps.
You should also avoid choosing high-sensitivity mini cameras. The optimal value is 0.2-0.3 lux. For night surveillance, it is recommended to give preference to devices with IR illumination, which allows you to get a clear picture at any time of the day.
Small surveillance cameras have different viewing angles
Varieties of hidden cameras, their characteristics
Based on the design, the cameras can be boxed or unpacked. The first option is represented by full-fledged surveillance devices. Frameless cameras are built into clothing items, household appliances, interior and other objects.
Depending on the princIPle of operation, cameras can be analog or digital. Analog devices transmit the image in the form of an electrical television signal. Standalone cameras DO NOT provide high image quality. Any external influences will become a prerequisite for the appearance of all kinds of interference. However, such devices are characterized by low cost.
Digital mini-devices are very popular today, which are installed at the point of access of a mobile signal. After fixing, the image is converted into a digital signal, which is transmitted to the server. Such hidden IP cameras allow you to get a high-quality picture with high detail.
Depending on the sensor installed in the camera, the device can transmit a black and white or color image. The first option is characterized by greater clarity of picture reproduction.
There is a division of hidden cameras into two groups: analog and digital.
Covert cameras: choice of invisible helpers
Full security of the facility is provided using equIPment for round the clock surveillance. The most valuable and effective devices with advanced capabilities are covert surveillance cameras, which are characterized by compact dimensions, making them inconspicuous to the prying eyes. Such equIPment can be used in any field of activity where it is impossible to use a conventional camera.
Features of wired and wireless cameras
According to the data transmission method, surveillance devices can be wired and wireless. For the functioning of the first option, it is necessary to use cable products that serve for signal transmission. In this case, twisted pair, fiber optic or coaxial cable is used. This option is rarely used for covert surveillance, since it is difficult to organize inconspicuous wiring.
Wireless micro cameras are available in two versions. Some devices transmit a signal via Wi-Fi or other technology, while others work offline, we write files to a memory card that is built into the equIPment. Wireless cameras operate on AC, battery or rechargeable battery.
Due to the small dimensions in the wireless models of the first option, the signal transmission range is too reduced. The equIPment receiving the signal should be located as close as possible. in the line of sight. These wireless mini surveillance cameras can be connected directly to a laptop or smartphone, which will be used for surveillance.
Standalone mini cameras EquIPped with a memory card slot
The connection is made via a Wi-Fi network. The signal goes to the Internet through the router. Using any device that is connected to the network, you can view the m records.
There are factors that negatively affect the use of wireless Wi-Fi cameras. Installing the antenna unmasks the covert surveillance device. When placed in a building structure, the data transfer rate is significantly reduced. Wireless cameras consume more power than standalone cameras. Therefore, in some cases there is a need to connect the device to the mains.
Standalone mini cameras EquIPped with a memory card slot. The device is powered by a built-in lithium-ion battery. The camera, depending on the shooting mode, can work from 2 to 30 hours. Such a device should be periodically checked to ensure that the card is full with information and the battery is discharged. This camera is not suitable for long-term use without monitoring.
Wireless hidden cameras operate on AC, battery or rechargeable battery
Review of the best self-contained mini cameras with internal memory
The multIPurpose compact model Ambertek RS101 is very popular. The device measures only 25x25x26 mm and weighs 11 grams. The camera allows you to get a color image in AVI quality 640×480. In addition, the device makes it possible to take photos with a resolution of 1600×2000. The camera is equIPped with an internal storage in the form of a memory card with 64 GB.
The device works autonomously thanks to the built-in 140 mAh battery, which allows continuous shooting for 1 hour. The device is charged from a portable charger or laptop. You can buy a mini-camera for 2.5 thousand rubles.
Another good model for covert surveillance is the Ambertek MD80 SE 54x20x15mm camera. The device captures at a frequency of 30 fps, allowing you to get AVI quality 640×480. The camera has an internal 32 GB memory card. Built-in battery provides 1.5 hours of device operation.
This model is equIPped with various types of clIPs, which makes it possible to fix the device on any surface of clothing or furniture. The cost of the camera is 3 thousand rubles.
Good image quality in Full HD 1920 x 1080 allows you to get Ambertek MD90 mini camera. The dimensions of the device are 53x25x23 mm. The built-in battery ensures continuous operation of the camera for 2 hours. The compact device is equIPped with LEDs for infrared illumination used for night observation and a motion sensor.
A security camera with motion sensor and recording can be used as a webcam. The device is characterized by a viewing angle of 170 degrees. The recording is stored on an internal 32 GB storage device. You can buy a camera with a motion sensor for 7 thousand rubles.
Features of installing a hidden camera at home
Before installing a hidden camera, you should decide on the installation option, which can be stationary or temporary. Both methods have a different approach to fastening, however, the devices must be securely hidden from prying eyes.
The choice of the installation site for covert surveillance is primarily determined by a good overview. Indoors, the device is best placed in a corner for maximum coverage of the room. The best option is the position of the camera, which provides a vertical angle of 65-75 degrees between its imaginary line of sight and the wall. The larger the room, the greater this value.
Installation of cameras can be stationary or temporary
Most models of portable cameras are not equIPped with a mount, so mounting elements will need to be purchased separately (depending on conditions). The best solution is to buy a special detachable platform that adjusts the camera’s angle of view. The device can be easily built into a drywall wall, fixed on the Armstrong ceiling or disguised as an interior item.
If the device is wired, it is better to install it in the upper part of a bookcase or wardrobe, and hide the wires behind furniture. You can attach the camera to a decorative element, and mask the cable products.
Device capabilities. Classification by place of installation, method and format of data transmission, color rendition.
If the house is equIPped with fire and burglar alarms, mini-cameras can be placed on motion sensors or smoke detectors, which are located on the ceiling. The wires will run next to the cable products of the burglar alarm, which will NOT raise doubts in the uninitiated person.
Top Models Spy Wireless Micro Cameras for Covert Shooting
Among the budget options, one of the best is the Jumbl Hidden Spу Camеra home surveillance camera, which is hidden in the alarm clock. The device has an IR illumination for night shooting and a motion detector, which allows it to work actively when it detects the slightest vibration in the room. Such a camera is a stand-alone equIPment, in which a 32 GB memory card is embedded. You can view the recorded content on a two-inch screen. The price of such a model is 3.6 thousand rubles.
The spy camera U8 USM Disk (in the form of a flash drive) is ideal for the office. Recording is performed with a frequency of 30 fps, which allows you to get an AVI 720×480 image. The battery life is 1 hour. The device is equIPped with an internal storage in the form of a 32 GB memory card. You can buy such a camera for 5 thousand rubles.
An interesting model is a fountain pen with a Spy Pen HD camera. When exposed to the top of the device, the camera starts shooting at 720p. The model is equIPped with a slot for storage up to 8 GB. The model has a USB connector for data transfer without removing the memory card. You can buy the device for 8 thousand rubles.
Noteworthy is the spy model Foscam FHC994 H.264 Mini, which allows you to get an image with a resolution of 720p. The camera is equIPped with a motion sensor. The device has a slot for a 64 GB memory card. Such a camera can work continuously for 8 hours. The device is characterized by the presence of a wide objective, which provides a viewing angle of 160 degrees. How much does a hidden camera cost? The price of the model is 11 thousand rubles.