The word zoom migrated into the Russian language from the English zoom, which means “Increase”. Using it, you can visually zoom in or out of visible objects. Image enlargement can be achieved in two ways: hardware (using lens optics) or software (using applications).

Digital zoom (Zoom).

It's software. Magnification is achieved by “stretching” the image.In relation to CCTV cameras, such a zoom is mainly used on PTZ cameras; the operator saw something interesting, pointed the lens at the object, if there is one optical zoom, I first used it when the image is not large enough to use digital zoom. You need to understand that if the resolution is not high enough and the object is far away, then we will get an overly stretched, poorly visible image consisting of large pixels (dots). Another thing is if you have modern digital video surveillance cameras with huge , in this case the image using digital zoom will consist of more points, therefore the quality of the resulting image will be an order of magnitude higher. Digital zoom can be used on a DVR, on a digital IP camera, or when viewing video on a computer using a player or editing program. Is good addition to optical zoom or in its complete absence.

Optical zoom (Zoom).
The increase occurs by changing the focal length of the lens. CCTV cameras with such a lens are called varifocal cameras. Varifocal cameras with a 2.8-12mm lens have become widespread. As you already understood, this is a range of focal lengths that can be changed, and thereby enlarge or zoom out the image.

The varifocal lens can be equipped with an electric wire, that is, you can change focal lengths remotely using settings on the DVR, computer, or mobile application. A lens with this design is called "motorized". The cost of cameras with such a lens will be significantly higher. It is also worth noting the disadvantage of this design: in severe frosts, the operation of the mechanical elements of the auto drive may be disrupted, which can lead to the inoperability of the zoom in winter or before the onset of warming.

A varifocal lens without an electric drive does not have this drawback; the focal length and sharpness on cameras with such a lens are usually adjusted once - during installation. As a result, we get the zoom we need and the viewing angles we need, depending on the operating conditions.

Let's look at the features of the 2.8-12mm zoom (vario) lens.
2.8mm - in our case, this is the minimum extreme position, the picture will be as distant as possible, the image will be small, but at the same time the viewing angles will increase.
12mm is the maximum extreme position, the picture will be “zoomed”, that is, enlarged to the maximum, while naturally the viewing angles will be minimal.
You can find a compromise, set the middle position, for example 7.4 mm. It all depends on your needs.
If we compare the resulting images when using digital and optical zoom, then the optical one undoubtedly wins, because with a good matrix and optics it does not produce visible optical distortions.

Zoom CCTV cameras (Zoom).
These are surveillance cameras with a “motorized” lens, which we mentioned earlier. Most often these are PTZ street cameras, with the ability to adjust zoom, focus and aperture. Most models are equipped with the ability to use digital zoom in addition to optical zoom.
Please note that such a camera has autofocus, otherwise after each pointing at new object You will have to adjust the focus manually, which is not very convenient.

Questions, comments and suggestions write to: samohvalov@site

PTZ IP cameras provide the possibility of panoramic viewing of the controlled space. Any security system requires the presence of high-quality video surveillance. Accordingly, the ability to control the position of a surveillance camera in the vertical and horizontal planes opens up extensive possibilities for monitoring what is happening in the territory under control. SpetsTechConsulting presents PTZ video surveillance cameras with different rotation speeds, zoom and image processing capabilities, as well as other characteristics, which together determine the equipment to belong to different price categories. In addition, we immediately offer you a whole range of video surveillance services. Price list for video surveillance installation on a separate page.

It is preferable to purchase PTZ IP cameras if you are interested in organizing the highest quality video surveillance. The presence of such a camera at the controlled object allows you to see the smallest details of what is happening, thanks to the presence of the zoom function. PTZ CCTV cameras are equipped with optical and digital zoom. When choosing PTZ cameras To implement a video surveillance system, it is necessary to pay attention to the most significant parameter of the lens – the optical zoom factor.

Optical zoom uses the movement of lenses inside the lens to enlarge the image. This enlargement method does not affect the quality of the resulting video image. Digital zoom, when enlarging a picture, unfortunately, leads to a loss of quality. PTZ IP cameras presented in the SpetsTechConsulting catalog have various characteristics, information about which is presented in full. Our specialists are ready to provide professional advice and provide comprehensive assistance so that you can choose the optimal PTZ video surveillance cameras for implementing a security system.

At SpetsTechConsulting you can buy PTZ IP video cameras for organizing video surveillance outdoors and indoors. Distinctive feature street modifications of PTZ IP cameras is their ability to work efficiently and continuously in a wide temperature range. Such PTZ IP surveillance cameras are equipped with a special housing, thanks to which weather conditions in no way affect the image received from the camera. Cameras designed for video surveillance in closed spaces are not equipped by manufacturers with such protection from adverse climatic conditions.

Every year, PTZ IP cameras are improved; manufacturers produce new modifications with wide functionality and capabilities. "SpetsTechConsulting" presents cameras the best manufacturers, with the help of which it is possible to implement video surveillance in closed and open spaces at the highest level. Use modern electronics capabilities when implementing passive safety measures.

For outdoor video surveillance, Spetstechconsulting recommends using outdoor IP video cameras that are perfectly protected from any climatic influences.

The activities of our online video surveillance store cover the entire range of equipment for security and safety systems, which includes:

and much more

Carrying out deliveries throughout Russia, our company delivers goods even to the most remote regions of the country. We try to satisfy the most demanding client.

Aktiv-SB specialists understand the specifics of the operation of security and video surveillance systems not only in Moscow, but also in remote regions with difficult climatic conditions. Our employees will offer you the most suitable options both in terms of functionality and cost, tell you about their capabilities and justify the need to use certain technical systems.
The trading house of security systems Aktiv-SB provides service and warranty service sold equipment, acceptance and inspection of goods poor quality, exchanges faulty equipment.

Our clients are commercial organizations and end consumers, installation companies and government enterprises. More than 50,000 registered users of the corporate website have access to a constantly updated database of technical documentation, certificates for modern security systems, and also participate in the affiliate program and special promotions conducted by the company.

For the convenience of our relationships with clients, we cooperate with installation organizations that are ready to install video surveillance systems of any complexity and will always come to your aid. Therefore, if necessary, you can not only purchase equipment from us, but also, for example, order the installation of video surveillance systems or carry out maintenance of other security systems.

The work of our security systems hypermarket is based on the principles of honesty, openness and decency. We look into the future with confidence and strive to develop and improve every day.

An IP camera with a varifocal lens and optical zoom will be an excellent solution for monitoring a large room, warehouse, store, street, or yard. At good resolution, the user will be able to see distant objects in detail. A controlled IP camera with optical zoom provides access to zoom and viewing angle settings, allowing the owner to better control the coverage area.

Features of an IP camera with zoom and varifocal lens

In the wide range of our online store there is a large number of zoom IP cameras according to favorable prices. Here it’s easy to choose and buy IP cameras with zoom and varifocal lenses at prices starting from 2,000 rubles. Exact cost and the recommended installation site depend on certain features.

Here are the main ones:

• Installation method and type of installation of a managed IP camera.
• Approximation factor. For example, it could be an IP camera with a 20x zoom.
• Convenience remote control lens focus.
• Lens rotation degree and standard viewing angle.
• Image color. For example, there is a budget option - black-and-white IP cameras with a varifocal lens.
• Maximum photo and video resolution.
• Availability of memory for storing footage and its maximum capacity.
• Permissible limits of high and low air temperatures.
• Maximum air humidity.
• Camera weight and dimensions.
• Instructions included.

All this information can be found in the product description on the website. All important technical parameters are indicated for each device. By comparing them with current conditions, requirements and objectives, you will be able to choose best model at the best price. You can also listen to reviews from previous customers who faced similar security and monitoring tasks.

After placing an order, the goods will soon be delivered to the specified address in Moscow. The basic package has everything you need to fully operate an IP camera with zoom.

• Description
• Characteristics
• Reviews
• Videos and useful files
• Peculiarities

• 1. A convenient solution for online video surveillance via the Internet of a country house, dacha, etc.
  2. Cloud service provides free remote viewing and access to the archive (SD card) With mobile devices.
  3. Optical resolution 1 MP, maximum resolution 1280 x 720 Pix (720P).
  4. Optical Zoom (3x) .
  5. Night vision 15-20 meters.
  6. Rotating device 355° horizontally and 90° vertically.
  7. Video recording is possible as on local computer, to the memory card and to the recorder.
  8. Camera in a metal case, protection class IP66, Temperature: up to -30° C.
  9. Thanks to the P2P function, the camera does not require static address and special settings for remote viewing, you just need to connect it to the Internet and install it on your computer or mobile device special application CamHi.(Android, iOS). Also latest versions The software can always be downloaded from our website in the "Support" section).

• Model
  Model	3951-WPTZ (935W)
  Type	P2P IP Wi-Fi camera (HD)
  Peculiarities	IP66 protection, metal housing, rotating device, Zoom
  Main characteristics
  Wi-Fi support	Yes
  Operating temperature range	-30....+ 50 C
  Areas of use	Surveillance of a house, store, territory, etc.
  Installation	Indoors, outdoors (ceiling, bracket)
  Working with the DVR	Yes
  Viewing angle	26°-90°
  Applications	PC, IOS, Android
  Color, sizes and weight
  dimensions	220 x 128 x 230 mm
  Weight	1200
  Color	White
  Shooting in Low Light
  Minimum illumination	0.01 Lx
  Night photography	Yes (range 15-20 meters)
  Number of LEDs	22
  Matrix
  Matrix type	progressive CMOS sensor
  Matrix size	1/3" inch
  Matrix resolution	1.0 MPix
  Lens	2.8 - 12 mm HD Zoom
  Zoom	Yes (3x)
  Video
  Compression format
  Frames per second	1-20
  Permission	1280 x 720 pixels, (720P), 640 x 480 pixels (VGA), 320 x 240 pixels (QVGA)
  Reverse	vertical / horizontal
  Record	Continuous recording, schedule recording, alarm recording
  Sound
  Built-in microphone	No
  Built-in speaker	No
  Data storage
  Cloud	No
  PC	Yes
  Memory card	Yes
  Smartphone, tablet	Yes
  FTP	No (only sending photo on alarm)
  DVR	Yes
  Memory card
  Memory card type	MicroSD
  Max. memory card capacity	32 GB
  Rotating device
  Horizontal	355 degrees
  Vertical	90 degrees
  Security Settings
  Notification by e-mail	Yes
  Access control	Yes
  Data transfer
  Supported Formats	TCP/IP, HTTP, TCP, UDP, SMTP, FTP, DHCP, DNS, DDNS, NTP, UPNP, RTSP, P2P, ONVIF
  Speed	802.11b: 11 MB per second (max), 802.11g: 54 MB per second (max)
  Safety	WEP/WPA/WPA2 encryption
  Viewing from mobile devices	Android, iOS
  Power supply
  Nutrition	DC 12V 1.5A
  Power supply 220 V	Yes
  Functions
  	Eat
  	Yes (rtsp://camera ip address/11)
  	Eat
  WPS	No
  Interfaces
  	MicroSD
  	Wi-Fi IEEE 802.11 n/b/g
  	Ethernet (LAN)
  	Audio In/Out
  Equipment
  	IP Wi-Fi camera
  	Ethernet cable (1 m), WiFi antenna
  	Power adapter (1m)
  	Mounting (with set of screws)
  	Software disc, user manual in Russian
  	Warranty card
  Frame
  Housing material	Metal
  Protection	Protection class Video Video surveillance with a Zodiak camera is easy! Video Video recording from outdoor IP camera Zodiak 935W (1280x720P, street) Don't forget to set the video quality appropriate for the recording in the viewing settings :) Wireless technologies make life much easier. A striking example is modern systems video surveillance based on Wi-Fi devices. Outdoor IP camera Zodikam 3951-WPTZ (935W) (PTZ, metal, Zoom, WiFi, P2P, ONVIF, HD, 1MP, IR) is one of the popular options for organizing such a complex. The model is compact, mobile, and easy to install without the use of cables. The viewing angle of 26°-90° and the optical resolution of the lens allow you to obtain high quality image large area. The price is 11950 rubles. The flexibility of the equipment is also reflected, that is, the ability to integrate with other similar systems.