# cctv camera, composite outputs

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#### danrogers

##### Member
Hi all, i'm looking to get a new cctv camera. the model im looking at on ebay comes with a bnc connector.

my question is, can I plug that into a standard composite input? I know I will need a cable of somesort to convert the bnc but just wondering if it will work?

#### KeepItSimpleStupid

##### Well-Known Member
You can buy a BNC to F adapter and then use standard RG-6 or RG-59 cables.

I doubt the CCTV camera really needs a 50 ohm termination. The BNC is typical for high end camera's. Does the camera spec mention output impedance of 50 or 75 ohms?

#### koolguy

##### Active Member
Hi, what is the cost of your CCTV??

#### Ross Craney

##### New Member
CCTV cameras are a composite output (unless it is an IP camera) & will work straight into a video input of your TV (I'm guessing that is what you want to do)

#### Nigel Goodwin

##### Super Moderator
Hi all, i'm looking to get a new cctv camera. the model im looking at on ebay comes with a bnc connector.

my question is, can I plug that into a standard composite input? I know I will need a cable of somesort to convert the bnc but just wondering if it will work?

You just need a lead - or an adaptor, BNC to phono adaptors are commonplace. BNC is composite, and 75 ohms just like the phono (or SCART) connection.

#### danrogers

##### Member
thanks all for clearing that up

here is one of the cameras' Im looking at - it states 75 ohm **broken link removed**

#### Nigel Goodwin

##### Super Moderator
thanks all for clearing that up

here is one of the cameras' Im looking at - it states 75 ohm **broken link removed**

You just need to fit an adaptor on the BNC - we do this on all the cameras at work, phono sockets are far easier than BNC.

#### ericgibbs

##### Well-Known Member
thanks all for clearing that up

here is one of the cameras' Im looking at - it states 75 ohm **broken link removed**

hi Dan,
A point to watch out for which depends upon your application is the view width angle.

I got a device a couple of years ago for night IR work, to over the car and driveway.
When I tried I found it had a view angle of only 5deg thats why it had a range of 15mtrs, to totally useless, all I could was about a square meter of the car bonnet.
I got my money back.

I would check the view angle.

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#### danrogers

##### Member
Thanks Eric and Nigel. Good point about the view angle last thing I want to do is to be looking at a pathing slab or something

#### Ross Craney

##### New Member
As Eric said the IR dispersion is very focused. The 15m range will be optimistic. They don't specify the lens but I'm guessing it is about 3.8mm. 380 line is about the lowest resolution. The type of mounting bracket used does nothing for attack resistance. If you are serious about the need for a camera then spend a bit more & get something that will do what you want. A few specs you want with CCTV cameras - at least 540 TV lines , varifocal lens , low light cabability ,
a 'branded" chipset (sony , samsung ) at least 1/3" HAD CCD (stay away from cmos) , backlight compensation. You should be able to get one in an armourdome for about 60 quid

#### danrogers

##### Member
nice one cheers harvey. I might just chop and replace im not sure yet

#### BrownOut

##### Banned
I've experimented with all these cheapo security cameras, and found them all to be pretty much useless. I finally spent some real money and ordered good cameras from Super Curcuits **broken link removed** I'm happy wiht this camera's performance, but it doesn't do well in low light. There are special cams for that.

Be sure to order the lense if you're gonna get one of these.

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#### HarveyH42

I'm using two of these, **broken link removed** , and they do a good job, day or night. Replaced the lens in one with a wider angle view, get most of the backyard. Not real high resolution, but don't need to read license plate numbers. I can easily spot cats and squirrels, and send the dog out. Might post a picture of what's on my monitor later. Not bad for a cheap $25 camera... #### Ross Craney ##### New Member What you may consider a good job day or night looks to be different to me. 420 line cmos sensor - come on #### HarveyH42 ##### Banned Top left: Driveway Top Right: Sidewalk in front Bottom Left: Carport Bottom Right: Backyard Just built in LEDs an streetlights for illumination. The backyard camera is a little out of focus... #### Attachments • P1010894.JPG 157.9 KB · Views: 422 #### Ross Craney ##### New Member I'm surprised it is as good as that , you must have a fair bit of ambient lighting. Still useless for recognition purposes which is the name of the game #### HarveyH42 ##### Banned I'm surprised it is as good as that , you must have a fair bit of ambient lighting. Still useless for recognition purposes which is the name of the game Well, I can recognize a car in my driveway, or a cat in the yard, when the dog starts barking, so I don't have to go to a window to see what the fuss is all about. I can recognize which neighbor comes over and steals my free local newspaper... But I don't really need high detail for most things. The daytime images are better detail. Fortunately, I don't live in a high crime area, and just have the cameras out, is deterrent enough. You get what you pay for, but for$25 these aren't completely useless.

I've got a B/W board camera I bought years ago, for just under \$30, C-mount lens (not included), and no case, but is 520 lines, and very low light. Unfortunately, lenses were more expense than the camera, and went for the cheap, and could only get about half my backyard in focus. Didn't want to run two cameras, just to watch my dog, so switched. Need to upgrade my DVR sometime, only 4 channels, and really need 8.

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