Varifocal Lens Security Camera

Varifocal Lens Security Camera: What it is and How to Choose One 

A varifocal lens is a motorized camera lens with the ability to adjust its focal length and its focus–to zoom in and out. This is a fixed lens camera, which has no ability to zoom. This has obvious applications in CCTV security cameras, since it allows the camera to achieve high-resolution, zoomed-in, auto focused images of faces, license plates, and other relevant data caught on security footage.

Varifocal Lens vs. Fixed Lens

Varifocal lenses work so well in surveillance CCTV cameras because they can survey both a fairly large and a fairly small field of view–and thanks to their ability to autofocus, the distortion and blur that can occur in CCTV footage is minimized or eliminated.

A fixed lens is more limited since it’s essentially frozen in one lens position covering one field of view. Some fixed-lens cameras capture video with a high enough resolution that magnifying the footage after the fact still provides pretty good visual definition, but not all of them. Still, fixed-lens cameras are appropriate in certain CCTV applications where the field of view doesn’t need to be especially large or especially small–for example, mounted over a door or in an elevator.

Varifocal Security Camera Advantages

Varifocal lens cameras are appropriate for a wider range of locations than a fixed-lens.

They effectively monitor open outdoor areas like parking lots, parking garages, and courtyards, plus open indoor areas like warehouses and lobbies, but are also useful in hallways and public areas.

They are especially good in situations where shrinkage and theft are problems, since they can provide close-up HD video of the hands, pockets, bags, and faces of suspects.

A varifocal lens can be configured to automatically zoom in on things in response to movement, or it can be remotely done by a security system operator or monitor. This makes it an especially useful feature for cloud-based CCTV systems that prioritize remote monitoring.

There are also advanced varifocal lens cameras that can not only zoom in and out, but also swivel horizontally and vertically. This is ideal for a remote monitoring situation where multiple angles need to be covered, but there is only enough power, room, or budget for one camera.

How to Choose a Varifocal Lens Camera

Which camera you choose will be based on the field of view that you need to cover, and how detailed you want your zoomed-in images to be. Varifocal lens cameras are more expensive than fixed lens, and there is price variation within the different types of varifocal lens.

Varifocal lens cameras come in different aperture ranges:

• 2.8-12mm lens 
• 3.5-8mm lens 
• 6-60mm lens
• 5-100mm lens

“Aperture” is a word that describes the size of the opening in the lens that light comes through. Higher numbers represent smaller openings, and lower numbers represent larger openings. It’s important to choose a varifocal lens with an aperture range that is suited for the setting you need it for, with the right balance between depth of field and detail.

With varifocal lenses, a higher number and smaller aperture is generally preferred for large-scale and outdoor settings, since this allows the greatest depth of field–meaning that very little in the shot is blurry and out of focus. This is the type of varifocal lens that has the most utility in parking lots, above entrances and exits, and in large indoor spaces such as warehouses or large office spaces where a wide scope is necessary.

However, lower numbers and larger apertures are capable of capturing more detail, even though they have a more limited depth of field and greater blurriness outside the area of focus. This is very useful in indoor settings such as offices, lobbies, and retail stores where it is important to catch close-up details of faces, registers, and computer screens, but not as important to have a wide field of view.

Varifocal Optical Zoom vs. Digital Zoom

Even fixed lens cameras these days are usually equipped with a digital zoom. Is it still worth investing in a varifocal lens?

Yes it is! Digital zoom works by enlarging individual pixels, which basically creates blur. You’ve experienced this if you’ve ever tried to use your phone or computer to zoom in on a low-resolution picture. This is especially problematic in situations where you might be trying to read a license plate or get a good look at a person’s face.

Varifocal optical zoom, on the other hand, with its physically extending and retracting lens, actually records more pixels as it zooms in. This maintains the detail and definition of the image even when at maximum zoom.

When to Use a Varifocal Lens Camera

These cameras are a great security solution in a number of settings but especially these:

·        When there is no good place to mount a camera close to the area you need to survey. A varifocal lens can make up the difference in proximity by using a calibrated aperture and field of vision. This could be a long driveway, a large parking lot, or a distant entrance.

·        When you need to clearly make out fine details. This could include cashier stations, ATMs, main doors, and parking lot ingress and egress.

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Pros and cons of using drones for perimeter security

Pros and Cons of using Drones for Perimeter security

Physical intrusion in private properties still remains a major concern today. To counter this, people generally resort to video surveillance in combination with other hardware.

According to a report from Markets and Markets, the video surveillance market, which includes both hardware and software, is presently at USD 45.5 billion and is expected to reach USD 74.6 billion by 2025.

These unmanned aerial vehicles (UAVs) offer a range of benefits over traditional security measures, including improved coverage, faster response times, and reduced costs. For physical security installers, integrating drones into their security solutions can provide a significant competitive advantage and open up new business opportunities.

Perimeter security is an active barrier or fortification around a defined area to prevent all forms of intrusion. Modern security systems are an amalgamation of sophisticated hardware and software that generally include cameras, motion sensors, electric fencing, high-intensity lights, and a command center to manage them all.

Challenges with conventional security systems (without drones) for perimeter security

Below are some of the drawbacks and limitations that are inherent in a conventional security system:

·        CCTV cameras and motion detectors are stationary, thus leaving plenty of room for blind spots.

·        Patrolling requires human guards – for larger areas, this is the least efficient way of securing a premise.

·        Response to an intrusion is delayed since a human responder has to reach the location.

 

5 advantages of using drones for perimeter security

While there are several advantages to using perimeter security drones, customers must know that not every benefit may apply to every vertical. For example, drones may offer better coverage in some cases, but if a site is riddled with obstacles in the form of complex buildings, UAVs may find it difficult to operate. Having said that, here are five benefits:

1. Improved coverage

One of the most significant advantages of using drones for perimeter security is the ability to provide wider coverage of the area being monitored. Drones can fly at various heights and angles, enabling them to capture footage from locations that may be difficult or impossible to reach using traditional security measures. As a result, drones can provide a more comprehensive view of the perimeter and identify potential security threats more effectively.

2. Faster response times

Drones can respond to security incidents much faster than human security personnel. Once a potential threat is detected, the drone can quickly move to the location and assess the situation, providing real-time information to security teams. This enables security personnel to respond more rapidly and effectively, potentially preventing security breaches or minimizing the damage caused by such incidents.

3. Reduced costs

Drones can be a cost-effective alternative to traditional security measures. By using drones, physical security installers can reduce the need for expensive human resources, such as security guards. In addition, drones can provide 24/7 surveillance, reducing the need for multiple security shifts and reducing overall operating costs.

4. Flexibility

Drones can be deployed quickly and easily, making them ideal for providing security in a range of scenarios. They can be used for event security, construction site security, critical infrastructure security, and many other applications. Additionally, drones can be programmed to follow specific flight paths or patrol specific areas, providing increased flexibility and customization.

5. Improved safety

Drones can be used to provide security in hazardous or hard-to-reach areas, reducing the risk to human security personnel. For example, drones can monitor areas that are prone to natural disasters, such as flood-prone areas or earthquake-prone regions. This can help to ensure the safety of security personnel and reduce the risk of injury or loss of life.

5 disadvantages of using drones for perimeter security

Although the advantages may outweigh the disadvantages in many verticals, customers need to remain aware that drones have several limitations. At the end of the day, drones are restricted by several factors and optimizing your security operations around these limitations is essential to achieving the best results.

1. Limited flight time

One of the primary limitations of using drones for perimeter security is the limited flight time. Most commercial drones have a flight time of 20-30 minutes, which may not be sufficient for large areas or extended surveillance periods. This means that multiple drones may be required to cover a single perimeter, increasing costs and complexity.

2. Dependence on technology

Drones are highly dependent on technology and may be susceptible to system failures, such as signal loss or malfunctioning equipment. This could compromise the effectiveness of the security system and potentially lead to security breaches.

3. Weather conditions

Many drones are highly sensitive to weather conditions, and high winds, rain, or fog can compromise their effectiveness. This means that they may not be suitable for use in all weather conditions, reducing their overall effectiveness.

4. Privacy concerns

The use of drones for security purposes may raise privacy concerns among individuals in the area being monitored. This could lead to legal challenges or a negative public perception of the security system, which could undermine its effectiveness.

5. Regulatory constraints

The use of drones for security purposes is subject to a range of regulatory constraints, including restrictions on flying in certain areas or operating outside of certain hours. This could limit the effectiveness of the security system or add complexity to its operation. Also, several countries like the US require commercial drone operators to hold valid licenses, which might further increase operational costs.

Conclusion

In short, the use of drones for perimeter security has both advantages and disadvantages. While drones offer improved coverage, faster response times, reduced costs, flexibility, and improved safety, they are also limited by their flight time, dependence on technology, weather conditions, privacy concerns, and regulatory constraints.

Regarding technology, factors to consider also include the type of drone to use. For instance, while remote-controlled drones are popular, several leading companies offer autonomous drones that offer a host of several advantages and disadvantages.

Physical security integrators must carefully evaluate these factors before deciding to add drones into their security solutions. With careful planning and implementation, however, drones can provide a significant competitive advantage and help to enhance the effectiveness of security systems.

FAQ (Frequently Asked Questions)

Q: How Drones add a new dimension to perimeter security?

A: Drones are mobile flying machines that can go anywhere. Thus they eliminate blind spots. In the event of an intrusion, a drone can apprehend an intruder real-time fast and send footage realtime to remote viewers.

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Q: What impact can drones have on the security industry?

A: Drones have pushed the technology bounds of the security industry. They are making security systems smart and robust, which can tackle all forms of threats.

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Q: What are the Uses of drones for perimeter security?

A: Drones are used in conjunction with CCTV cameras and other sensors to apprehend intruders fast and send real-time feedback to remote viewers.

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Q: Can we use drone for remote surveillance security purposes?

A: Drones can be remotely controlled using a fleet management system like FlytNow. Such a system allows a user to manage and control multiple drones from a unified dashboard remotely. The user even has access to the live video feed.

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Q: What drones are used for security operations?

A: 1. DJI Matrice 200 Series

2. Yuneec H520

3. Parrot Anafi

4. Autel Robotics EVO

5. DJI Inspire 2

6. DJI Phantom 4 Pro

7. Aibotix X6

8. Skydio 2

9. DJI Mavic 2 Pro

10. DJI Mavic Air

Video Surveillance in Parking Lots

Video Surveillance in Parking Lots a short Note 

Parking lots can benefit greatly from the security provided by Video Surveillance. Did you know that 80% of crimes at offices, malls and other retail outlets take place in the parking lot? Parking lots have unique security needs – with risks for both owner and customer. A comprehensive video security system can help protect both your property and your customers, helping your business remain competitive and your customers satisfied.

Benefits of Installing CCTV in Parking Garage:

Prevent theft – Many thieves see parking lots as potential gold mines – miles and miles of cars or personal property that they can take. Visible security cameras can help deter thieves from breaking into cars on your lot, and can help aid law enforcement in identifying criminals who do rob cars on your lot. Cameras can also help prevent theft of store property – shopping carts, outdoor displays, tables and chairs, landscaping, etc.

Improve image – Customers are undoubtedly the most essential aspect of many businesses. Keeping your customers happy and giving them a sense of safety and peace of mind when they're shopping at your business establishes a sense of trust and loyalty.

Liability issues – It's inevitable that an accident will happen in your parking lot. Whether it's a car crash, a slip, or an errant shopping cart denting cars, video surveillance is an easy way to avoid costly liability cases.

Remote monitoring – Advances in security camera technology have made it easy to check up on your parking lot security cameras at any time of day, from anywhere in the world. A system of IP Cameras managed by a NVR (Network DVR or Network Video Recorder) transmits your footage over the internet so you're never far away. This technology gives you the power to act quickly on security issues from anywhere.

Guarding against theft using Outdoor IP Camera

Are you ever have the experience of worried about strangers knocking at your door when your child at home alone? May be every parents have this kind of feeling. Needless to say, that is really a dangerous situation when adults were not at home. Thief or evil guy may take the chance of using children’s innocent resorts to all means in order to achieve his goal. How can we parents to avoid the same thing happen again? We would like to introduce Outdoor IP Camera. The best life and property guarder of your family.

Network Attached Outdoor IP Cameras and Wireless IP Camera attach to the network just like a computer. Set the IP address and they can be viewed by a web browser. Add powerful IP software and you can create a sophisticated surveillance system. Outdoor IP Cameras are much easier to install then the older analog CCTV cameras. The cameras are all connected to the network using standard network cable. The latest cameras can even be powered over Ethernet (POE), making installation even simpler. The new outdoor IP cameras from Axis are powered by POE.
Our complete Outdoor IP Camera systems for indoor or outdoor applications include Outdoor IP cameras, servers, storage, enclosures, lenses and software; everything you need to create a working surveillance system.

That sounds simple enough but when you’re trying to choose the right Outdoor IP camera you’ll begin to notice how many different types of cameras there are:
Weatherproof IP Cameras
Wireless IP Cameras
Indoor IP Cameras / Outdoor IP Cameras

That list can be even further segmented but you get the idea. It can be a dizzying process to wade through the available choices. But, there’s a reason for all the options and in our ongoing discussion of how to find the right Outdoor IP Camera for your project I’ll be detailing the camera types and how/where they are used.

Do you have a clear mind about Outdoor IP Camera, if not, buying one and supplying a more security environment for your children .

Reduce Crime with Wireless/ non-Wireless CCTV Systems

CCTV Cameras are probably the best ways to reduce crime with your business or home, and there are numerous of places to purchase CCTV equipment. Below are a few factors to consider once shopping for CCTV cameras that will help you save time and expense, as well as help you to preferable to protect your home.

CCTV systems are used in public places all over the world for crime prevention. Or in the case of a crime being committed, the footage from the cameras can be used to apprehend and convict the perpetrators, perhaps even recover stolen property. And if they are wireless CCTV systems, it’s even more convenient.

CCTV systems for homes and work are, of course, not as elaborate as the ones used in huge malls or city streets. But they follow the same principle. The signal from the cameras is transmitted to only a limited number of screens or monitors. The footage is recorded so you can view it at your convenience. The system is quite easy to set up so you don’t have to pay a technician to come over and install it. Since they are wireless and there are no cables to get tangled up in, you can change the location of the cameras as and when you wish. Wireless CCTV cameras are fast becoming the ultimate tool in the fight against crime.

Rather than hire security personnel, most people are choosing CCTV systems to monitor their home or business. Security guards gain a lot of knowledge about your property and your comings and goings even if they’re on the job for just a week. This information can prove invaluable to planning a break-in. No matter how clean their background checks, who can you really trust nowadays?

The sight of a CCTV camera on your property will psychologically impair a burglar’s nerve to break and enter. Security experts aver that this is the main reason that CCTV systems are so effective in preventing crime. If the criminal plans to go ahead with the crime regardless, there’s a greater chance that the fear will make him bungle the job and get caught anyway. Statistics show that shops and convenient stores that have visible CCTV cameras have fewer instances of shop-lifting or “stick-ups”.

Where to Set Up Your Wireless CCTV System

Survey the property that you want to protect. You’ll want a camera at all entry and exit points including windows. You can also install infrared cameras outside your home for night-time surveillance. If the system is for your shop, consider all areas of the shop that are not directly visible from the cashier’s desk. Then, of course, there’s the cash counter. Consider any area that might be an advantage to a burglar, and put up a camera there. The receiver and monitors should be installed in an area where you spend most of your time.

Some CCTV systems come equipped with motion sensors. So it is only when the system detects an intruder that the cameras will come on, accompanied by a piercing alarm. Some security systems will even call the police or your cell phone to alert you. This is especially useful if you’re away a lot or if you don’t have the resources to man someone at the monitors all day.

The form of your camera will even play a huge part in how well hidden you is, and exactly how secure you can your office or home. Often times, if a surveillance camera is very obvious or large, criminals will immediately try and destroy the camera before stealing merchandise or money, or otherwise not damaging the home. If your CCTV camera is well hidden, it will be a hardship on burglars to obtain the camera, and it's also more likely that you're going to catch the trespassing on tape accurately. A discreet camera will likely make customers forms of languages in your house feel safer. So, small cameras, dome-shaped cameras, and in many cases submergible cameras make the perfect idea if you wish to add a little more security to your dwelling or business.

Don’t wait till you’re the victim of a crime before taking precautions. Install a wireless CCTV system today and sleep easy.