Dome Security
Colts RCA Dome “Scandal”?
I know this scandal is old, but,
For all those retards that think the RCA dome pumps artificial noise during their games..your wrong, The security gaurd was also wrong.
If you knew anything about dome structures you would know that gravity holds the cover down causeing air pressure. Air pressure keeps cover intact (as said above, as a result of gravity), So when the crowd yells, air wave lengths move against the air pressure…what does this cause? A repetetive vibration in sound waves (The “Echo”), so for those who can just sit on a couch and yell “TOUCHDOWN!” every sunday, get your science facts straight.
People are always going to look for ways to bring top teams down. You don’t see anyone accusing the Falcons of cheating. No one cares about them or knocking them from their perch. They’re already dead as a (Vick) dog.
Security Camera Styles, Where, When, Why and Which Ones To Use
Security cameras come in several different types and styles with features and specs that can be overwhelming for someone who doesnt hold an electronics engineering degree. We will go through all of the major types of CCTV security cameras, where to use each style, as well as explain some of the basic specs so that you can decide what type of CCTV equipment is right for your security system.
Bullet Cameras
Bullet Cameras are weatherproof and tend to be smaller than other types of security cameras. They come in sizes and shapes ranging from the size of a tube of lipstick to the size of a typical soda can. Bullet Cameras are also called lipstick cameras, tube cameras or missile cameras. If you are looking for nightvision or infrared cameras, you will find the largest selection among bullet cameras.
Dome Cameras
Dome type security cameras are the most popular style of security cameras. They usually have a base with a screw-on dome. The domes are tinted so that it is difficult to tell where they are aiming, this makes them very popular for retail applications. Most domes cameras are plastic, though you can check the armor dome section for vandal-proof domes which tend to be weatherproof with metal bases and polycarbonate sealed domes.
Armor Domes
Armor dome security cameras, or vandal domes, tend to be a little bit bigger than standard domes. They are more rugged in their construction and usually have heavy duty seals which make them weatherproof for outside installation. Most of the higher quality armor domes have a 3 axis gimbal, which allows them to be mounted on a wall as well as a ceiling. Armor domes are available with fixed lenses or adjustable lenses as well as with or without nightvision.
Box Cameras
Box cameras, or professional style security cameras, are the most versatile style of CCTV camera available. They do not usually include a lens or a mount, so you will need to purchase the lens and an indoor mount or outdoor housing separately. They are more complicated than domes or bullets, but box cameras allow for specialty lenses (i.e., for license plate recognition) and generally have more video quality controls than other styles of security cameras. If you are mounting a box camera outside it will require an outdoor housing.
PTZ Cameras
PTZ cameras or Pan Tilt Zoom cameras are the most complicated style of security camera. These PTZ cameras are generally large dome cameras with motorized and computerized internals allowing for the camera to be controlled from the DVR, remotely or through a PTZ controller. These cameras use RS485 to receive controls and programming, so your DVR may require an RS232 to 485adapter. PTZ security cameras can also be programmed to run patterns. Speeds vary from 10 degrees per second to speed domes which can move in excess of 300 degrees per second.
Hidden Cameras
Hidden security cameras, covert cameras or spy cameras are some of the most popular style of security cameras available. These cameras use pinhole lenses with very tiny lenses and are usually enclosed in some other device that doesn’t look like a camera. Motion detectors, sprinkler heads, smoke detectors, wall clocks and custom configurations are common housings for covert security cameras. Some hidden cameras come with built-in microphones as well. Consult your local laws concerning audio surveillance.
Infrared / Nightvision
Infrared cameras or nightvision cameras are extremely popular with our customers. These nightvision security cameras provide clear color images during the day, and black and white images at night. At night, infrared security cameras glow red and provide the camera with artificial light that can only be seen by the camera. These IR cameras operate even in total darkness. The more LED’s a camera has, the farther away it will see at night. Nightvision cameras are available in weatherproof bullet, dome and armor dome styles.
Low Light Cameras
Low light cameras are generally not able to see in total darkness, but are excellent for areas where clear security video is needed 24 hours a day, and there is some lighting available. These cameras, also called Low Lux cameras or Day/Night cameras can use a feature called sense-up to provide color images even in very low light conditions. Cameras with sense-up will sometimes need to be programmed during installation as the light sensitivity and shutter controls are adjusted through On Screen Display (OSD). Low light security cameras are usually available as domes, high-end bullets and box cameras.
Lighting Required
Cameras marked with the lighting required tile require better lighting. These cameras have a lux rating of 0.1 or higher and are generally best for installation in offices or homes where there will generally be better lighting available. (the lower the lux rating is, the better the camera will be able to see in low lighting. Some vendors will call these Day/Night cameras because they have a relatively low lux rating of 0.1lux, however, in our experience, that may be technically true, but far from the low light video quality most people expect.
Indoor
Indoor security cameras do not have any weather sealing. Water and moisture will kill a security camera faster than any other condition, therefore, these cameras should only be installed indoors where they will not see condensation or extreme temperatures. Indoor only security cameras come in dome styles as well as covert and PTZ styles.
Outdoor
Outdoor cameras come in various ratings. Weatherproof ratings begin with “IP” (international protection rating) and end with a number above 54. The higher the number the more weather resistant the camera is. Typically, IP65 is the standard rating, meaning that a camera with an IP65 rating can withstand a blast of direct water. IP67 means a camera is submersible up to 1 meter. Use weatherproof cameras outdoors or where temperature and condensation are an issue, like inside a walk-in cooler or in a workshop with lots of dust.
Outdoor Housing Required
The outdoor housing required category is for our more advanced security camera styles such as box cameras which require a separate housing to be placed outdoors. Housings are available separately in our accessories section and come with or without heaters and blowers for defrosting in the winter and camera cooling in the summer.
Fixed lens
Cameras that are marked with the fixed lens tile come with a fixed, non-adjustable lens. These cameras typically have 3.6mm semi-wide angle lenses providing an image that is 74 degrees wide. The higher the lens number in mm, the tighter the shot will be, and vice versa. Indoor domes with fixed lenses can be adjusted by purchasing separate mini-lenses in our accessories section.
Adjustable lenses
Security cameras with manually adjustable lenses, sometimes called vari-focal or “zoom” lenses allow the user to manually adjust the viewing angle when installing the cameras. These cameras allow the installer to dial in the level of detail they want to see in their shot and are very useful for front door shots or cash register views where detail is very important. The lower the lens number is, the wider the shot will be and vice-versa. Lenses with wider ranges are more versatile and can be adjusted over a wider viewing angle range. These lenses also control Iris openings giving the user the best light level adjustment without having to make any installation changes. Varifocal lenses are available on domes, armor domes and bullet cameras.
Motorized lenses
Security cameras with motorized lenses are usually called zoom cameras or ptz cameras. These cameras can be controlled electronically to zoom in and out in real time. They require RS232 to 485 adapters to control and are nice to have when someone is sitting in from of the DVR and is able to determine the best viewing angle for the situation. Motorized lenses are usually seen on ptz style dome cameras and as an option on box style security cameras.
What exactly is a TVL?
TVL is a resolution rating meaning television lines, the higher the number of TVL a camera has, the higher the picture quality of that camera. Basically the TVL is a count of the number of horizontal lines a camera can reproduce. This measurement started out as a way for the original television broadcaster to claim they were broadcasting in higher resolution than they actually were, but today, it is a useful measure when determining the comparative video quality between two seperate cameras. Today, the industry standard resolution seems to be 420TVL. High resolutions begins around 480TVL, though many cameras are available with resolutions well above that. 540TVL, 600TVL, 650TVL and 700TVL cameras are not uncommon. This is a sliding scale of course. The difference between a 350TVL camera and a 420TVL camera will be more dramatic than that between a 420 and 480TVL rating. Still, as a general rule, when it comes to TVL, the higher the number, the clearer the picture.
What is Lux, and why is it important?
Lux is a measure of illuminance, or in other words, a measurement of the amount of light available. The lux rating of a camera tells you how much light is required for that camera to provide a usable image. Keep in mind that the term “usable” is very subjective, and that lux ratings can be “adjusted” by unscrupulous manufacturers and marketers to make it appear they have a better CCTV camera. In general, the lower the lux rating of a given camera, the better that camera will perform at night or in low light conditions. Be wary of comparing lux ratings of cameras from different manufacturers as the lux rating relies on the F-stop at which it was measured, usually seen as 0.1 Lux @ F1.2. This subject requires an entire article to discuss properly, though you should now have enough information to make an informed decision on which product is right for you.
About the Author
Alex Underwood is Director of Product Development at CCTVDynamics. http://www.CCTVDynamics.com is working to make high end security surveillance solutions available to every American who wishes to protect their property, their families and their businesses. We believe a secure home or business doesnt need to break the bank. Check our catalog to explore different styles of security cameras.
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White Plastic Indoor Dome Case for CCTV Security Camera $13.37 |
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Indoor Wall Security CCD Dome Camera External Housing $9.21 |
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Bosch Detection Systems Dome G3BPW60P PTZ CCTV Camera Security G3 G3B61C G3BPW $500.00 |
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Hot Cheap Wholesale 8 Pcs Audio CCTV 24LEDs IR Dome Security System Camera w03-1 $139.00 |
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Security 48 LEDs IR CCTV Color Dome Camera S83 $23.00 |
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F9-SONY HAD PAN/TILT CCTV DOME SECURITY CAMERA & REMOTE $197.57 |
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Promotion 520TVL Sony Mic Audio Video Dome CCTV Security Camera DVR System w100 $36.98 |
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Fake CCTV Dummy Security Camera Surveillant Surveillance LED Twinkle DOME 3pcs $14.99 |
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(2) Fake Casino Type Surveillance DOME DUMMY SECURITY CAMERAS w/ RED LED LIGHT $18.88 |
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Qty. 4 Dome Fake Dummy Surveillance Flashing LED Camera Business Security Dummy $19.98 |
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Color CCD Infrared IR Dome Security Camera w 48 LEDs $35.32 |
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M420W Indoor day and night vision Dome security Camera $41.00 |
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CCTV 600TVL bullet/Armour Dome CCD security Camera 1T H.264 Network DVR System $399.00 |
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GVI AHP-3112S Outdoor PTZ Dome Security Camera 650TVL 12x Zoom 1/4″ Sony CCD $300.00 |
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Home Office Security Dome Fake Dummy Wireless Realistic RED IR Camera Cam CCTV $4.65 |
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LOT OF FAKE HOME SECURITY DOME CCTV CAMERAS SYSTEM+2 YARD SIGNS+WARNING STICKERS $19.95 |
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FAKE DOME SECURITY CCTV DOME SPY CAMERAS SYSTEM+WARNING YARD SIGN+STICKERS LOT $19.75 |
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(6)24LED Dome CCD Security Indoor Camera H.264 CCTV 1TB DVR security system $319.00 |
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6 Armour Dome CCD Security Camera 24LED 8-Ch 1TB H.264 DVR HOme security System $339.00 |
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6X CCTV IR CCD Outdoor/Armour Dome Security Camera+1TB H.264 Net DVR CCTV system $339.00 |
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8CH 1TB H.264 DVR Surveillance System+6X22LED Security CCD Dome Indoor Camera $339.00 |
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CCTV Waterproof/Indoor Dome CCD security camera H.264 DVR 1TB Security system $339.00 |
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Hemisphere Dome Case for 4″ CCTV Security CCD Camera $16.42 |
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Blk Plastic Housing Dome Case for CCTV Security Camera $7.72 |
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FAKE SECURITY SPY SURVEILLANCE DOME CAMERA SYSTEM+WARNING SIGN+DECAL STICKER LOT $16.10 |
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Surveillance Camera Cam Home Office Fake Dummy Security Safety Dome CCTV Model $4.65 |
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KOREA EGPIS Fake Dome Camera Security Indoor $11.00 |
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1/3″ CMOS Color IR LED 420TVL DOME Night CCTV Surveillance Security Camera $10.26 |
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1/3″ CMOS 24 IR 420TVL Color DOME Night CCTV Surveillance Security Camera $10.26 |
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DOME OUTDOOR SECURITY CAMERA EVERFOCUS EHD350 520TVL NEW $75.95 |
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Beige Black Plastic Dome Case for CCTV Security Camera $8.82 |
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CCTV Security CameraHousing Dome Shell Cover Box Gray $7.16 |
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TC72- SAMSUNG SCP-3370HP 600TVL 37x OPT ZOOM PTZ SPEED DOME CCTV SECURITY CAMERA $1,422.61 |
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CCD Color Dome Security Surveillance Camera PAL System $31.20 |
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540TVL 1/4 7 Inch SONY CCD 22X Zoom 120m IR High Speed PTZ Dome Camera Security $360.99 |
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IR Dome Security Camera Waterproof Outdoor CCTV SONY CCD 520TVL Array $86.99 |
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Outdoor Dome Security Camera 600TVL Day Night CCTV b6q $89.98 |
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KT&C INDOOR DOME CCTV SECURITY CAMERA KPC-DN100NHV14 $125.00 |
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Samsung Scc-1000 Security System, Smart Dome Controller $9.99 |
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CCTV CCD Security Camera Plastic Indoor Dome Housing $7.83 |
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24 Leds Security Surveillance Color CCD Dome Camera 500mA $34.74 |
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H0-COLOR VANDALPROOF 1/3 HAD SECURITY CCTV DOME CAMERA $118.55 |
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CCTV Security Camera Wall Mount Dome Housing Box Case $8.64 |
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4 x 1/3″Sharp Security Color CCD DOME DVR Cameras $96.99 |
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Black CMOS 420TVL 24 IR Leds Dome Security Camera with Audio S03-A $7.73 |
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1x Outdoor Security CCTV IR Dome Security CCTV Camera $44.88 |
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Mini 420Color CCD CCTV Security Dome Video Camera #1151 $19.99 |
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2x Outdoor CCTV IR Sharp CCD Security Dome Camera $87.49 |
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4x Outdoor Security CCTV IR Dome Camera 1/4″ Sharp CCD $164.99 |
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8x Outdoor Security CCTV IR Dome Camera 1/4″ Sharp CCD $324.99 |
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3 Dummy Fake Dome Security Camera w/ Flashing LED Indoor CCTV Surveillance BKJ $9.99 |
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2 Outdoor Security 1/3 Sony CCD IR Dome CCTV Camera 540 $159.90 |
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EXELON DSN-F801 DOME SECURITY CAMERA 700 TVL SONY CCD $75.00 |
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CCTV Security Camera Wall Mount Shell Dome Case Housing $12.36 |
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420TVL Color Surveillance Security CCTV Dome Camera wide angle 3.6mm lens CMOS $7.50 |
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4 Outdoor Security 1/3 Sony CCD IR Dome CCTV Camera 540 $299.90 |
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Black CMOS 420TVL 24 IR Leds Dome Security Camera with Audio S03-A $8.50 |
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White Plastic CCTV Security Camera Dome Housing Case $7.61 |
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4x American Dynamics Dome Cameras | ADLOVSIS49N | ADCD600-D0001 | Security | $28.00 |
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IR Surveillance Dome Security CCTV Camera wide angle CMOS Home Indoor $10.50 |
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2 Surveillance Video CCTV Color Day & Night vision Dome Indoor Security Camera $52.99 |
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Dome CCD IR Security Camera Outdoor Day Night Wide Angle CCTV Surveillance BDQ $44.98 |
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Black CMOS 420TVL 24 IR Leds Dome Security Camera with Audio S03-A $7.61 |
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Panasonic WV-CW474S Color CCTV Dome Security Camera | D/N | 480 TVL | 1.6Lux | $19.99 |
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Bosch Extreme EX49MNX803BC-N Color Dome CCTV Security Camera | D/N | 2.9mm NTSC $31.00 |
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Vitek VTD-MVX2910/L35W Dinion CCTV Color Security Mighty Dome Camera | 550 TVL | $26.60 |
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CCD Security Clear Dome Camera | Black | Color | $19.99 |
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4 Surveillance Video CCTV Color Day & Night vision Dome Indoor Security Camera $92.99 |
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600TVL Sony CCD IR Medium Speed Indoor Dome Security Mini PTZ Camera10 X Zoom $375.00 |
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LG LVC-D100NM Indoor Color Dome Security Camera $49.95 |
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Vandal Proof Security Dome Camera, 1/3″ Sony Super HAD $169.00 |
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Fake Dummy Imitation Dome Home CCTV Security Surveillance Camera $1.00 |
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3.6mm Lens PAL IR CCD Security Dome Camera w 10M Cable $41.80 |
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540TVL Pan Tilt SONY CCD H.264 D1 Network IP PT Dome Security Camera Audio $261.99 |
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Security CCD Dome Camera Blk Plastic Mini Housing Case $7.57 |
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SONY CCD Security Dome Metal Video CCTV Camera +adapter $44.95 |
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SONY CCTV 540TVL IR DOME SECURITY CAMERA NIGHT VISION $50.59 |
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LG LVC-D100NM Dome Security Camera with Cable $49.00 |
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3.6mm Lens 18-LEDs Dome Security 1/4″ CCD IR Camera PAL $24.77 |
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Vandalproof IR Dome Security Camera with manual ZOOM 650TVL USA SELLER $97.90 |
Dome Security Camera
