How To Select A Surveillance Camera Lens - Article

How to Select a

Surveillance Camera Lens

Author: Elia E. Levi

When you finally set out to select your Surveillance Camera, for realizing your well thought out Home Security project, you should be advised that, besides other elements equally important, the lens plays a determining part in the camera performance.

It is the lens that determines the amount of light entering the camera. Besides the quality of materials and of manufacturing, usually reflected in the price, some of the lens characteristics have much bearing on the viewed picture.

Even if you do not want to become an expert in lenses, there are a few concepts that you should understand before you purchase your surveillance camera.

The subjects are well known from the field of still photography, so that the principles should not be completely unfamiliar for whoever has some practice of family picture taking even at a very basic level.

In most surveillance cameras, lenses are interchangeable. Therefore you should decide if the picture seen on the monitor is satisfactory for your application, with reference to the depth of focus, the angle of view and the amount of detail you want to distinguish.

In case you are not satisfied with the performance of the standard lens supplied, you should ask to see how a different lens would improve the images you want to observe.

Normally one should select the best overall picture for the purpose. Note that by changing one of the characteristics (i.e. aperture) one modifies other related properties (i.e. the depth of focus).

The overall result is a matter of compromise whereby, by sacrificing somewhat one feature one gains a better response from another one.

Fixed focal length is a common selection: although limiting somewhat the dimension of the space where all objects result clearly perceived (depth of focus), it simplifies the mechanical construction and reduces the price.

You may be familiar with autofocus feature found in modern digital cameras. There is no comparable capability in cameras because they must work unattended. A lens whose focal length can be manually adjusted is called a Varifocal lens but should not normally be considered for surveillance purposes.

Equally too sophisticated for the application would be a motorized zoom lens, capable of being commanded from a distance to select the preferred level of detail between wide-angle and telephoto.

Fixed iris or aperture is another characteristic to be considered that simplifies construction and operation, albeit with some compromise on picture quality. It would probably be easier to provide sufficient illumination then going for more complex optics.

In conclusion, despite the nice and costly alternatives available, for a simple home surveillance system it would be advisable to select one of the simplest lenses, provided that the quality of the picture is sufficient for the intended purpose.

About the Author:

Elia Levi is a retired engineer. He built a website to assist with a step-by-step Guide to understand, design, select and set up, all by yourself the best and least expensive surveillance system for your home security. Read more on the subject of this article at http://www.1st-diy-home-surveillance-guide.com/Surveillance-camera-lenses.html

Article Source: ArticlesBase.com - How to Select a Surveillance Camera Lens

The Need Of A Baby Monitor - Article

Parents have to be watchful with their children as great care is needed in young age. Monitoring devices are the best remedial solutions that have given great relief and they can track any problems with the child when the parent is away. It can also work as a baby alarm and it employs a radio transmitter, receiver system with inbuilt microphone and speaker sets. Baby monitor systems work in the range of 49-50 megahertz and some work in the level 900 MHz as well. There are even wireless monitoring systems for the safety of the child.

Dual baby monitors are used in the present day's technology and they include a dual receiver for improving the convenience. Most of them come with a handy design and the distance range supported is up to 800 feet which is immaculate. This is of great help to the parents during the naptime of the babies. The baby monitor also includes sound lights. Monitors work on two batteries 1.5V each. The users rarely gets disturbance in the transmission. The LED display will show the intensity of the baby's cry and actions can be taken accordingly. Most of the monitors are intelligent enough to distinguish the TV noise and any other noise from a baby's cry.

The digital baby monitor promises better working and reliability conditions. The internet can be used to know more about the monitors. It is a good idea to read latest reviews and testimonies. It is better to gain extra information from before shopping anything new.

If you are looking for more information then feel free to visit Dual Baby Monitor and Baby Monitor

Article Source: http://EzineArticles.com/?expert=Jay_Becker

PC Based CCTV Surveillance Systems - Article

Here is a quick description of the exciting new PC Based security option that is taking home/offise security to whole different level.
Basically, PC Based CCTV Surveillance is using your pc as your central command for security camera's or even if you only use your webcam or nanny cam. Using the PC to control and monitor your surveillance system can open up many different option's that give you absolute control and viewing capabilities, that normal surveillance and security systems just do not provide.
Setting up your PC Based CCTV Surveillance System has become quite easy. If you can set up some strategically placed security camera's and follow software download instruction's, you should be alright. Not that I would recommend cutting any corner's or settling for sub-standard surveillance equipment, but if you are smart and you do your due diligence, you can set your self up with a complete cctv surveillance system, or even a simple one, without spending much time or money.
Many homeowner's/business owner's need surveillance system's to watch over people they know. Either employee's , nanny's or even pet's for while your are at work. These particular surveillance system's can be set up with only 1 or 2 small camera's. Many people will even settle for using the webcam - sometime's to spy on unknowing babysitter's or in other similar situation's.
But the great part about doing this is that you can still have all the same capabilities that are used with the full scale PC based CCTV surveillance systems, like:
Complete coverage of ALL camera's
Instant recording capabilities
Wireless security camera's
Motion activated surveillance setting's
Remote camera monitoring
And more
For an extra fee, you can even get the PC to Cell Phone surveillance software. This is, in my opinion one of the best feature's of using pc based surveillance system's. With it you have the capability to monitor EVERY ONE of your security camera's or webcam's - FROM ANYWHERE!
Just set up the software and follow the instruction's and you can keep constant visual on your home , business or office:
Anytime You Want
While on vacation
While at work
On dates - (maybe for checking on your pet's)
While at a friend's house for special occasions -(like for Super Bowl Parties ;)
And for many other reason's that might take you away from your home/office for any length of time.
The reason's for using PC Based CCTV Surveillance System's are endless. And setting up your security system is very easy and most time's, totally inexpensive. Sometime's it's best to get certain product's from separate site's for quality and pricing reason's. But most time's this will ensure that you get the exact PC surveillance system that suits your need's - and many time's shipping will be FREE with most purchases.
PC Based Surveillance Systems Reviews and Information.
Convert Your Webcam to Surveillance Camera and monitor your home from anywhere.
Article Source: http://EzineArticles.com/?expert=Joshua_Mintz

Security Cameras - Electronic Angels Article

Video cameras are the watchdogs of the world. Where criminals would usually have free access, video cameras, both hidden and visible throw floods of fear on would-be intruders. It's one thing in court for them to lie about where they were that night. It's quite something else trying to lie about a video of them doing what they are charged with.

Video surveillance is relatively new and the technology is changing rapidly. If you've bought an electronic wrist watch in the last year, you have more computing power on your wrist than the command modules of the astronauts that circled and landed on the moon.

Not long ago, you had no choice, but to have the cameras wired together or all wired to a central console. This was very expensive and had to be installed by professionals. Now, you can buy wireless cameras that can be mounted anywhere by anyone that can handle a screwdriver. Some of these units have their own pedestal. They don't even have to be screwed in!

The wireless technology is so advanced that the cameras have a range of 500 feet. If you want to spend the money, you can buy video cameras with a range of up to double that.

Like the human eye, video surveillance cameras are affected by the intensity of light, by moisture and chemicals in the air. Special hazardous environment cameras can be bought for industrial purposes, but for the home, you don't have to worry about these cumbersome units.
Your home cameras will have to deal with darkness and moisture, however. Any good surveillance camera kit with have at least one night vision camera. This is another example of technology racing forward. Not long ago, only the military could afford these. Now, they are readily available and better than anything they used in Viet Nam.

Outdoor video cameras come in waterproof cases. They also usually come with the night vision feature although you should always check the manufacturer's literature to double check.
Some security cameras are made to be boldly displayed so that anyone going into its field of view will know they are being watched. Other cameras are disguised as household articles. Some people use them for intruder watching. Others use them to keep an eye on employees like the famous Nanny Cameras.

Security cameras are wonders of technology. With a little research and a very modest investment, you will add immensely to your peace of mind and the security of your home and business.

This article was created by Octavien Remillard. He is an electronics engineer with 40 years of experience on the road servicing everything from lasers to high speed copiers. His passion is to make technology easy to understand and use by the average person. You can get more information at: Security Cameras.
Article Source: http://EzineArticles.com/?expert=Octavien_J._Remillard

Video Baby Monitors Article

Video Baby Monitors

Author: Dominick Ciccone

A video baby monitor is a must have for all current, and expecting parents. It provides a calming piece of mind by allowing you to always see that your child is safe and sound, even when you cannot be by his or her side. A video monitor works by transmitting a high resolution color video signal to a handheld receiver that can go with you wherever you travel to in the house. These are are quickly replacing audio-only baby monitors, and with their impressive list of features, it is no surprise.

Buying a video baby monitor can sometimes be a confusing task, so I've summarized all of the great features that you should be taking into consideration when buying one of these units. It is important to select a monitor that you feel comfortable with using, because after all, it will be helping you keep your child safe.

• Wireless Operation - A great feature of a video baby monitor is that it is completely wireless. This means that there is no complicated installation required, and that you can also take the receiver with you anywhere you go. Most units are able to transmit a high quality signal up to around 350 ft and do not interfere with any other wireless devices in your home.

• Color Video - The monitor you purchase should have a receiver equipped with a color LCD screen. The usual screen size for a quality video monitor is approximately 2.5 inches, and this produces a very clear image of your child. Being able to see your sleeping baby in full color really helps put your mind at ease, and allows you to appreciate their beauty even when you aren't able to be with them.




• Audio - Hearing your child is just as important as seeing your child, so your video monitor should have a quality microphone for transmitting clear sounds. Also, a nice feature that some video monitors have is LED lights on the receiver that re-act to sounds transmitted by the camera. These can visually alert you when your baby is making a noise.




• Night Vision - An impressive feature of these monitors is their ability to transmit video in complete darkness. They are able to do this because they come equipped with Infrared LED lights that will automatically turn on when low light is detected. This allows you to keep an eye on your child even when he or she is sleeping during the night.




• Price/Overall Value - Most video monitors with the features I have described can be found in the 50-100 dollar price range, but it is important to note that the more expensive items have much better quality video and sound. I think it is important to find the best monitor possible that you can comfortably afford. Overall, I would say that they are truly a great value for their price. They come with impressive features like night vision, and color video, both of which help to keep your baby safe and your mind at ease.

A reliable video baby monitor is one of the most important items parents should have when it comes to the safety of their baby. Their price and features make them a great value, and they can help put a worrying parent's mind to ease.

About the Author:

Find more information on Video Baby Monitors at : Color Baby Monitors.com. They offer a wealth of knowledge and reviews for baby monitors.

Article Source: ArticlesBase.com - Video Baby Monitors

Home Security Cameras Article

Home Security Cameras -

Live A Secure Life

Author: Abhishek Agarwal

Home security cameras provide homeowners a peaceful mind regarding their personal property, loved ones and pets. Almost everyone can get a home security camera as it is affordable and also very simple to install.



So, why do we need to use one of these cameras? These cameras let the owners of the house know what is happening in their house or on their property. Keeping an eye on the teenagers, service people and caregivers can also be other reasons.



The first affordable cameras of this version were called the nanny cameras. As technology progressed, the images that these cameras captured were much better. The home security cameras send images to the base station to let the person view via a computer, television or a cell phone. Nanny cameras might not have encryption but they are easy to use and small in size. These unencrypted signals that are wireless are easy to hack.



Monitoring loved ones by using the home security camera is something that has been happening for quite some time now. The nanny cameras keep a track of what is been happening to your children when you are not at home. These cameras are used for old people, infants, aging parents and people who are ill.



An inexpensive and easy way to keep a watch on the pets can be the home security camera. These cameras make sure that your pets are not getting in to a mess or getting into anything that is harmful to them.



The home security cameras can be used to monitor any part of the house or also the home business. Surveillance equipments need to be utilized to monitor those areas outside your house where animals or your personal property which includes certain equipments of your house may be kept.



When you are going to choose one of these security cameras you need to keep in mind your needs and your budget. If secret surveillance is required for small areas then the simple web camera or the nanny camera can be used. These are of low cost.



Kits are available for those who need to monitor the entire house. Home owners need to choose kits that are most appropriate for their needs and layout. Both wire less and wired security cameras are got nowadays.



It makes it much easier for you if you install your home security cameras when you start building your house rather than fix it up later while you are remodeling it. By making use of the wireless technology you can remove the problems relating to wiring. Many of the homeowners do use wireless connections. These also operate in the same way. Advances in their security make it more efficient and simpler.



The home security cameras lets its users protect and maintain their property.

About the Author:

Abhishek is a Home Security expert and he has got some great Home Security Secrets up his sleeve! Download his FREE 104 Pages Ebook, "Home Security Made Easy!" from his website http://www.Survival-Today.com/116/index.htm . Only limited Free Copies available.

Article Source: ArticlesBase.com - Home Security Cameras - Live A Secure Life

Tips On Buying Surveillance Cameras

10 Ideal Tips for Buying Surveillance Cameras at Discounts Prices

Author: MatthewPawlina

Security is a prime concern the world over. Homes and shops are equipped with state-of-art surveillance systems that include: cameras, monitors, recorders, and cabling to name just a few needs.

Before buying a surveillance camera and its peripherals you need to evaluate your needs and study the local laws about installing security cameras. There are surveillance systems available online and offline at a wide range of costs but buyers need to be aware that low-quality components will not provide adequate security. In general surveys indicate that a complete system should cost USD 500-USD 1000 per camera. One can consider a whole range of surveillance products: fake security cameras; covert surveillance cameras; wireless security cameras; wired surveillance cameras; night vision security cameras; and home surveillance cameras.

Before buying a surveillance system you must:

1. Read all about security surveillance and evaluate your needs. Think whether you should spend large sums of money to solve minor problems.

2. Make a list of what components would best suit your purpose. Know what to look for in a workable surveillance system.

3. Log onto the internet and browse through surveillance products and note down their price as well as features.

4. Visit others who have surveillance systems installed and find out what their experience has been.

5. Read reviews of surveillance products to get familiar with cameras and peripherals.

6. Get quotes both online and offline and make comparisons of costs as well as installation and maintenance.

7. Ask about warranties and possibilities of upgrading the surveillance system in future.

8. Check about live feeds over the internet and recoding needs too. Picture quality is another aspect that needs careful thought. Cheaper cameras will give unclear or fuzzy pictures and the surveillance will be useless.

9. Follow the law always and do not record audio as its illegal.

10. Buy from reliable stores and not from here today gone tomorrow outfits. Since a security system is a long-term investment it is best to buy from a reliable vendor.

It is important to buy surveillance camera and peripherals of superior quality and function. There are many online stores that offer surveillance cameras at great discounts. Often as promos accessories are offered at lower prices if a person chooses to buy a surveillance camera and accessory package. So survey the costs carefully online and offline and think about the advantages of buying a system from an auction site. Another possibility is buying a second hand surveillance system that has been refurbished and comes with guarantees.

With constant innovations surveillance cameras now come with in built intelligence and can detect suspicious behavior before a crime is committed. Surveillance equipment is widely used in public places, homes, offices, government buildings, and banks. Most surveillance cameras feed live video to control rooms that are monitored by security personnel. There are cameras that can detect gun shots and facial expressions too! So when buying a system consider advancements in technology, price, adaptability with local security systems, and the law.

About the Author:

Matthew Pawlina is a writer for Surveillance Cameras , the premier website to find surveillance cameras, wireless surveillance cameras, home surveillance cameras, wireless home surveillance cameras, digital surveillance cameras and many more.

Article Source: ArticlesBase.com - 10 Ideal Tips for Buying Surveillance Cameras at Discounts Prices