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How Far Can A Night Vision Security Camera See?

Whether you're looking to protect your home or business, it's important that you properly utilise technology to ensure all your belongings, staff, and family are safe. One way that you can do this is by using security cameras. If you're looking to safeguard a large area, you must know how far your security camera can see, particularly at night. In this post, we look into why you should use night vision security cameras, what factors influence how far they can see and how far they can see at night.

Focal Length

The focal length is the most important factor in determining how far your security camera can see. Some cameras have a variable focal length, while others have a fixed length. The focal length of your camera is measured in millimetres (mm). The smaller the focal length your camera has, the wider the field of view. They are opposing this. The larger your focal length, the smaller the field of view.


As well as ensuring that your security camera can see at the right distance, you also need to make sure that it's able to provide you with a clear image. In addition, the resolution of the camera will often affect its price.


Particularly for wireless security cameras, the camera's location is also important. This is because materials such as concrete or brick and obstacles such as trees can weaken the signal strength between the receiver and the camera.

What About Night Time Specifically?

Many standard cameras on the market require some amount of light to see. As a result, these cameras are not able to see at night. Always check the product specifications to ensure the camera has night vision capabilities. In addition to the above factors (focal length, resolution and location), how well your security camera can see at night depends on:

  • The number of LEDs installed
  • The type of LEDs installed
  • Its lux rating
  • Whether it features infrared (IR) technology or a different form of night vision

How Far Can Security Cameras See At Night?

Night vision cameras often use infrared technology to see clearly at night. This involves flooding an area with light that the human eye cannot see. This technology allows top quality night vision cameras to see for between 100ft and 200ft, helping you monitor your home day and night. We can also set up remote viewing, so you can keep an eye on your home no matter where you are.

As a general rule, you'll find that black and white night vision cameras cover a longer range than colour security cameras (most cameras operate in colour during the day but switch to black and white at night). Colour mode often fails in under 100 metres, but the black and white mode will still capture clear images. However, this will depend on the exact camera you buy, so ensure you closely read the camera's specifications. You can contact us for help and advice for selecting the correct cameras and the correct installation practices.

FAQ's About Night Vision Security Camera

People used to associate night vision cameras with military operations, wildlife documentaries and ghost hunting. However, the technology is now easily accessible and affordable, making it an ideal home and business security solution at night. Most break-ins or attempted break-ins occur in the evening or at night, so ensuring your home or office is protected 24/7 should be prioritised.

Before we look at specific influences that dictate how far your security cameras can see in the dark, let's take a look at three factors that influence how far your security camera can see generally.

The Best Long-Range Security Systems on the Market

  • Foscam, Mesh Wi-Fi Network Security Camera System.
  • XmartO, 8-Camera Wi-Fi Security System.
  • Sequro, GuardPro Wireless Security Camera System.
  • Arlo, Wireless Pro-2 Security Camera System.
  • Yeskamo, Long-Range Wireless Security Camera System.

A wireless security camera is like a webcam, except it can sit anywhere in your house and connect to your local wireless network as well as the internet. With this kind of camera, you can keep watch on your house from around the corner or from another country via a computer, smartphone or tablet, helping to ensure peace of mind that comes from knowing your home is under a watchful eye.

Wireless home security cameras can be used for all sorts of reasons. Still, typical uses can be keeping an eye on children, looking in on a sleeping baby at home, seeing what your pet gets up to while you're at work or even just checking who's at the door. They can also send you alerts if they detect motion, such as someone in your home who isn't supposed to be there.

Motion Sensing

Wireless security cameras work through your home internet connection, taking still pictures or video (usually 30 seconds or less) when they detect movement. They will notify you immediately via SMS or email when there's footage to be viewed. Some can even upload pictures and videos instantly to the cloud for safekeeping and immediate viewing. As well as calling up live video of your home any time you like, most cameras have motion sensing capability and tell you if something's amiss, notifying you via email or SMS when there's unexpected movement.

Once largely disregarded because they were too technical for the average user to set up, wireless security cameras have come long. Most now come with software that allows you to access photos and videos through your smartphone, as well as a web-connected computer, no matter where you are in the world. Setting them up takes just a few minutes, and just about anybody can do it.

How Do They Connect To A Network?

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One of the benefits of wireless security cameras is that they're generally small and unobtrusive. Most connect to your home Wi-Fi network, so you can place them just about anywhere in the home without having an ethernet cable running all over the place. Some even run on batteries to make them wireless – you'll see them marketed as "wire-free" cameras. You can move them from room to room on a whim or even deploy them outside the house if they're outdoor-capable models. But most wireless units will need access to a PowerPoint. It's generally easier to do this than to have a long run of unsightly blue ethernet cable unless your home is properly wired for ethernet through skirting boards (relatively few homes are).

If you do have the opportunity to use ethernet cabling, many Wi-Fi cameras have an ethernet port so that you can plugin directly. While Wi-Fi is more convenient, wired ethernet is faster and generally provides a more stable network connection. You may want to look for a camera that has power over ethernet (PoE) as a feature, as this will let you power the camera from the same ethernet cable used to carry data, avoiding the need for both ethernet and mains power cables to the camera (though you'll need a PoE connection box). 

What To Look For In A Wireless Security Camera?

Your camera should come with an ethernet cable (where applicable), power supply, antenna, wall mount (including screws) and set-up instructions. Here are some points to bear in mind when choosing your camera.


  • Resolution: Is it high-definition? This will affect picture quality and upload speeds.
  • Night vision: Does it have an infrared LED for night vision? 
  • Microphone: Useful, particularly when the camera is used as a baby monitor.
  • Speaker: So that you can talk through it (again, useful for baby monitor use).
  • Movement: Can its pan, tilt and zoom via remote control?
  • Storage: Is there built-in storage (memory card slot) for saving recordings locally?
  • Power: Does it run on batteries, and if so, will it take rechargeable batteries? Does it need to be plugged into mains power (how long is the power cable?). Can it use power over ethernet cabling (PoE)?
  • Networking: Will it work via ethernet cable, or is it restricted to Wi-Fi?
  • Mounting: Can it be fixed to a wall, or does it just sit on a flat surface?
  • Expandability: Can the system be expanded (and to what extent) with additional cameras and sensors for windows, doors and motion detection?


  • Monitoring: How do you view the video – via a web browser or mobile app?
  • Remote control or just viewing?
  • Motion detection: What capabilities and restrictions are there?
  • Alerts: Via email or SMS? For sound as well as a movement? 
  • Image clarity: Daytime and low-light quality.
  • Adjustable frame rates: This can be useful for varying the quality and file sizes of recording and streaming
  • Extra service costs: What is required for using the camera for streaming? Are subscriptions needed for storing and accessing videos remotely?

Image Quality

While most consumer-level wireless security cameras are very handy for casual monitoring, if you're serious about security, you'll want to check out higher quality systems, which are generally wired into your home and need to be installed by a professional. Good image quality is important if you're using your wireless security camera for even casual home monitoring for security. If it catches an intruder in the act, you're going to want to be able to identify them. Unfortunately, there's no simple way to tell how good the quality will be from the box.

Night Vision

Many cameras also offer night vision, particularly useful for security monitoring. It can pick up images in very low-light conditions and even in complete darkness, which is often how the house is when you're not there. However, the quality of images can vary greatly, and the distance to the camera is important – the closer, the better, generally. Many infrared night vision cameras don't capture much detail, though. Instead, they give you a grey-tone image that often shows little or no facial detail, leaving the offender looking like a ghost. Nevertheless, good night vision can make a big difference, and the captured images and video are usable.

Shine A Light

The latest trend for outdoor cameras is to have a built-in spotlight or floodlight. This provides a much better night-time picture than infrared night vision and in colour. Having illumination triggered by movement can also act as a visible deterrent to intruders. After all, if you're up to no good, you won't want to be hanging around under a spotlight.

Remote Access

Having the ability to view your camera's footage remotely is an important feature, given that you won't have access to your home computer if you're away on holiday. Here are remote access features to look for:

  • Email and SMS/MMS alerts: Can you set the camera to send email/SMS/MMS alerts when they're triggered? Can it automatically attach a recorded image to the alert?
  • Mobile access: You can't beat the convenience of being able to look into your home remotely via your smartphone or tablet. Most cameras have software for iOS (iPhones) or Android OS, but make sure it's compatible with your system.
  • Web access: Is the wireless security camera video feed accessible online through a computer that's not part of your home network?

Where Does The Footage Go?

Some wireless security cameras will store recorded footage on a flash memory card or an external storage drive connected to the camera. Some models offer better security by taking the images offsite immediately, saving them straight to the cloud (internet-based remote storage). Either way, you'll want to make sure you have a way of keeping any important videos and photos. Here's what to consider:

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  • Cloud storage: Some wireless security cameras may provide the cloud storage service for free, but with limited space and for a limited time. Others will provide more but charge a subscription fee. Alternatively, you may be able to save your files to your cloud service, like Dropbox, for example. Check if the camera software can be configured to connect to a remote storage file server and whether your particular cloud service will allow it.
  • Memory card: Does the device have memory card storage for recordings? This can be handy, as the images will be saved on the card in the camera for easy access and avoid having to configure and possibly pay for cloud storage. But there's the risk that the card or camera itself may be stolen.
  • PC storage: Can you save and store pictures/video to your computer using the PC program or through the web? This gives you much more storage capacity but requires that your computer be left turned on. And there's the danger that the computer itself could be stolen.
  • Smartphone/tablet storage: Can you save and store pictures/video to your phone or tablet using the camera's mobile app? If you can view images and video through your mobile device, can you download them and save them to it?

Other Features To Look For

  • Pan, tilt and zoom: There's a big advantage in having remote camera control to zoom in and make it look around the room with up/down and sideways movement. Models with this ability will generally cost more.
  • Motion sensing: You want a camera that can be set to detect motion and automatically take pictures and video and send alerts. Other considerations include whether you can set time slots for motion detection to be active and if you can adjust its sensitivity.
  • Audio link: Some cameras have two-way audio communication via the camera.
  • Battery life: As with any portable device, battery life is important. Battery-powered cameras aren't designed for all-day, every-day operation. Instead, they only record footage when motion triggers them or if you do so manually via the app. So it's important to have a motion-sensing schedule and the ability to change the sensitivity of the motion. Cameras without a scheduler should be placed in a low-traffic location where the motion detection won't constantly be triggered.

Wire-Free Or Mains Powered?

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Wire-free cameras are easy enough to set up and use that just about anybody can do it. Moreover, they can be quickly redeployed elsewhere in the home on your local network, just by picking them up and moving them, and access to viewing is available at the tap of a smartphone app. However, the trade-off for high mobility is battery life (unless you have a solar charger accessory available on some models) and video quality, which can be lower to save battery life.

So, should you go wire-free? In many typical households, you can use a wireless network camera that plugs into mains power and not have to worry about replacing or charging batteries. Depending on your home layout, that could be a better way to go in many cases. In cases where you don't have a nearby power point or don't want a power cord hanging around (remembering that many cameras are positioned up high for the best view), or you want maximum mobility, a wire-free camera offers the most flexibility. A cellular wire-free model operates over the 3G/4G (phone) network rather than Wi-Fi. This type of camera can even be the go-anywhere watchdog that you can leave in your hotel room to keep an eye on things while you're travelling. Of course, as with a smartphone, you'll need a mobile network data SIM card that works in that location.

However, for most people, a mains-powered wireless camera will provide the best solution. They give you the convenience of a wireless camera that you can deploy easily almost anywhere around the home without having to worry about battery replacement.

Battery Life Of Wire-Free Cameras

Battery-powered cameras are not designed for active recording continuously as they would very soon wear out the battery. So it is important to have a motion-sensing schedule and the ability to change the sensitivity of the motion. Cameras without a scheduler should be placed in a location that will not constantly be triggered. If the camera picks up too much motion during its scheduled monitoring period, the batteries will deplete more quickly. Suppose the motion sensor is set to high sensitivity. In that case, this will also deplete the battery quicker, as it will detect motion from further away and potentially get triggered a lot more frequently. The image quality of many cameras is not set too high quality by default. Besides requiring higher bandwidth to stream footage, high-quality images will consume more battery life. Here are some things that can affect battery life: 

  • A weak or heavily loaded Wi-Fi signal can lead to more consumption while the camera is on standby
  • More power will be consumed at night while the camera is in night mode 
  • Sensitivity set too high will lead to more recordings, which will deplete the battery more quickly

Wired-In Solution

There are, of course, many fully wired-in security cameras available, which need to be installed by an electrician at a fixed point. They should be considered a more permanent security monitoring solution but should be installed by a professional.


Wireless security cameras range in price from around $50 for a cheap single camera to more than $500 for a high-quality unit or multi-camera kit, depending on features like remote control, night vision, Wi-Fi, megapixel rating and lens quality.


Now that you understand how security cameras can see in the dark, the next logical step is to choose a device with the right technology for your applications. Most consumers will benefit from a smart IR camera because it provides superior image quality to thermal and night vision cameras. When using a camera for security purposes, you want to obtain as much detail as possible. Although thermal and night vision cameras work well for their intended purpose, they pale in comparison to smart IR cameras when used for home security. So before you pick up a security camera, make sure the device has the desired features and night vision capabilities that you need so you can feel confident with your purchase.

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