Lorex has been a provider of security cameras and security camera systems for over 30 years and is one of the most trusted names in the consumer security industry. We are known worldwide for our top-quality DIY security products that are both reliable and user-friendly. Lorex products can be purchased in many retail stores and online, where we offer a vast array of individual products and security accessories, as well as pre-assembled security camera systems. Lorex has head offices in Markham, Ontario, Canada and in Linthicum, Maryland, USA. We also have product warehouses in Markham, Indiana and California.

A zoom lens combines lens shape, diameter, and focal length and their respective distances from one another to vary aperture and magnification within a system. While some zoom lenses have close to 30 different optical elements that interact to create an image most zoom lenses have the same basic design, they consist of a number of individual lenses that may be either fixed, or slide axially along the body of the lens. One of the most common zoom lens designs divides the optical assembly into two sections, a fixed focal length focusing lens and an afocal zoom system consisting of a series of fixed and movable lenses. The afocal system's purpose isn't to create a focused image but to simply change the size of the image hitting the detector. The result is a focused image that changes size on the detector.

When we discussed the camera obscura in the beginning of this series, we noted that while a larger aperture to let light in would increase its brightness, it would also decrease the clarity of the image. After adding a lens into a camera obscura experiment, you can understand the relationship between these two variables a bit better. A faster lens (shorter f-ratio) will have a narrower depth of field (smaller plane of focus). Modern DSLR cameras allow a photographer to vary the aperture of their lens, thus changing the f-ratio or speed of their camera.

In my next installment of Photography Snapshot, we will move further away from the theory of photography and explore the exposure triangle, starting with aperture. We will begin to learn how to manually take control of the images you form and we will start short homework assignments to get you out shooting with your camera.

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Lorex prides ourselves on having a security solution for all types of properties and scenarios. We sell everything from 32-camera professional-grade wired IP security systems to easy-to-install wire-free (battery-operated ) security systems to smart home security products such as Wi-Fi cameras, video doorbells, floodlight cameras, and even security sensors. Not sure what solution is right for you? Try our Solutions Finder Tool or check out our Beginner's Guide to Lorex.

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Having security cameras for your home or business can provide you with many benefits. First, having visible security cameras can be an invaluable deterrent to prevent events before they happen. Second, security cameras from Lorex will capture high-quality recordings of events that could ultimately be used as evidence. Third, simply knowing that your security cameras are always there, along with the ability to remotely connect and see exactly what your cameras are seeing at any time and from any place, provides you total peace-of-mind.

In the last lesson we performed an experiment to focus the light of a candle through a lens. We also learned that to determine the focal length of the system, we move the focusing screen forward and backward until the image of the flame is in focus. Let's consider that candle/lens system for a moment. What do you think would happen if we replaced the lens with one that is twice the diameter with the same focal length? Would the image be twice as bright? Image twice as large? If you guessed the larger lens would make the image brighter, you would be correct. The larger lens has more area to collect light, which actually equates to an image more then twice the brightness at a ratio equal to πr² where r equals the radius of the lens. The image would, however, be no larger since the focal length of the lens is that same.

A simple zoom lens system. The three lenses of the afocal system are L1, L2, L3 (from left). L1 and L2 can move to the left and right, changing the overall focal length of the system.

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For an image to be classified as 2K, it must have approximately 2000 horizontal pixels. Following suit, 4K must have approximately 4000 horizontal pixels.

While a larger aperture diameter might increase the brightness and sharpen the focus, increasing the lens magnification will increase the focal length and thus enlarge an image. The amount of focal length that you desire will define how much magnification your lens needs. Think about magnification in terms of how much your light bends. The more curve in your lens, the more your light will bend toward a center focus. Creating more curve in a lens means adding thickness to the lens, thus adding more material to slow the light down as it passes through the lens. So as you can see, magnification affects not only the focal length but also the brightness of an image. We've been talking about magnification in terms of increasing the size of an image, where in almost all photography the image you create is significantly smaller then the original object. One type of photography where you are looking to increase the size of the image created is called macro photography. Special lenses are designed exactly for this specialized purpose, built with a long focal length and a very close object to photograph.

Diagram of decreasing apertures, that is, increasing f-numbers, in one-stop increments; each aperture has half the light gathering area of the previous one.

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There are many reasons why buying a Lorex security camera or security camera system is the right choice. With over 30 years of experience, our technology is top-of-the-line. We offer the features you need, such as 4K recording, Color Night Vision, Active Deterrence, and Smart Motion Detection, just to name a few. There are also never any additional fees after purchase as Lorex products do not require any monitoring or cloud storage fees. We also offer things such as free shipping, 1-year warranties, and a 30 day money back guarantee if you're not satisfied.

The term 4K is now an everyday word when people speak of television screens, computer monitors, or mobile phone resolutions. But what does it mean? And what does it have to do with security?

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The higher amount of pixels allows for a higher quality digital zoom so that details stay legible for longer as the zoom is applied.

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In the end, 4K security cameras will provide you with the best oppurtunity to capture useful evidence should an incident ever occur on your property. Not only do 4K security cameras deliver the sharpest details, their large image sensors allow for higher quality Color Night Vision and better digital zooms while reviewing footage. Please note, if you are looking to upgrade wired cameras, please ensure your recorder can support 4K or 4K+ resolution recording before purchasing.

While the lens focal length will effect field of view, another factor in field of view is detector size. In a DSLR you will generally have either a "cropped" sensor or a full 35mm frame sensor. A cropped sensor is defined by its crop factor or focal length multiplier (FLM); the ratio of a 35mm frame's diagonal to (43.3mm) to the length of the diagonal on the "cropped" sensor. In Canon DSLRs the crop factor is 1.6, while on most other brands of cropped sensors the factor is 1.5. This ratio is multiplied to the focal length to determine the focal length of a lens that would yield the same field of view. For example, a 50mm lens on a Canon cropped sensor would produce similar images to a full framed camera with an 80mm focal length lens attached. The cropped images will always "look" more zoomed in, however this magnification is simply caused by caused by the aforementioned crop factor.

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Lorex 4K Security Cameras deliver top-quality video footage to help capture vital details. Choose from our range of wired IP and Analog Cameras, wireless Wi-Fi Cameras, and Video Doorbell options to find the perfect solution for your home or business.

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A major determining factor in video quality is the size of the camera's image sensor. These sensors are classified by their number of megapixels (the equivalent to one million pixels). Ultimately, the higher the amount of megapixels, the better the video resolution.

Lorex security cameras and security systems are designed for DIY installation. The installation depends on the technology that the security camera or system uses. For example, we have two types of wired security camera systems: IP security systems and Analog security systems. Both require a cable from the security camera to a recorder. Wire-Free security cameras, as well as Wi-Fi security cameras do not require a hardwired connection to a recorder. Rather, they send their data wirelessly, either to a recorder, hub, or app. The difference is that Wire-Free cameras are battery-operated and do not need to be plugged in, while Wi-Fi cameras need to be plugged in or wired into the existing power connections, as is the case for Wi-Fi security doorbells and floodlight security cameras. To learn more on security camera installation, please visit our How to Install Security Cameras article.

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In photography, you often hear lenses described as a focal length and their f-ratio. The f-ratio describes the relationship between the lens diameter and the focal length and is calculated by dividing the focal length by the diameter of the lens. For example, if a lens were to have a focal length of 50mm and a diameter of 10mm, then the f-ratio would be 50mm/10mm=5 or otherwise referred to as f5. If you were to double the diameter of the lens, 50mm/20mm = 2.5, the f-ratio would be f2.5. As you have probably already concluded, lower or "shorter" f-ratio means more light being focused into the image, and thus a brighter image. The f-ratio and focal length of the lens will almost always be printed on the ring surrounding the glass. If you ever hear someone refer to their lens as "fast" or "slow" they are referring to the f-ratio of the camera. A "fast" lens is one that brings in the most light the quickest, thus having a short f-ratio, i.e., f1.2 or f2.5. A "slow" lens will take longer to collect the same amount of light, so generally the f-stop will be larger, i.e., f8 or f12.

Lorex 4K security cameras will leave nothing to question. With their crisp images and amazing digital zooms, you will have the best chance to capture the details you need, even from a distance. With the introduction of these new security cameras, the world of security monitoring has never looked better.

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The amount of pixels within screens has taken a giant step forward with 2K and 4K resolutions. Industry standards typically represent a 2K pixel ratio as 2048 x 1536 and a 4K pixel ratio as 4096 x 2160.

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This article is the third in a series teaching the basics of photography. We started by learning about the properties of light and how an image is created, and we also learned how a lens bends light to focus individual rays into a single bright image. With this lesson we are going to finish learning the scientific theory of lenses and how to use lenses for magnification in addition to brightness.

The final piece of the optics puzzle is something called field of view (FOV), in other words how much of the world the detector can see. The FOV of a lens depends on its focal length and the size of the detection surface or camera detector. Let's consider taking a picture of the same object while only varying the focal length of the system. As the focal length increases the FOV narrows, increasing the size of the image on the detector. FOV is fairly simple to visualize by simply following the ray trace in the optical system. One specialized type of lens is a "fish-eye" lens. These lenses are distinct because of their extremely short focal lengths, between 10mm and 20mm, and their bulging glass that looks like a fish-eye. These lenses have a 180-degree or larger field of view, making them particularly good for capturing the entire night sky in a single image.

The focal length of a lens is the optical distance (usually measured in mm) from the point where the light meets inside the lens to the camera's sensor.

Macro lenses are describe by their magnification factor, meaning that a 1:1 lens will produce a true to life image on the detector. A 19.05mm penny will produce a 19.05mm image on the detector, taking up over half of a full 35mm detector or nearly 80% of a cropped frame sensor (what you will find in most lower end cameras). A magnification factor of 1:1 is generally the minimum to be considered a macro lens, with other lenses reaching to the 1:10 range (magnifying an object 1mm in diameter into an image 10mm in diameter).