David Chan 0 Posted August 18, 2024 I have an analogue system with 8 cameras that uses coaxial cable. The system is failing because where the 12 V line meets the camera connector despite it being a push fit, there is corrosion around the connector. The connectors are housed in junction boxes which I have inspected and seem to be full of old spider nests. (Do spiders chew wires?) I have now realised that given the UK is damp, I will need to encase the connection area in silicone to prevent this from happening. I need a system that has got high resolution, (4K, is this the same thing as 8 MP?) Some cameras will need to cover a wide area and be able to be seen from 40m away, and some will need to be by the front and back door. I am confused about which system to go for. In my local area NW London, they seem to promote HikVision , and I read about security issues and the Chinese Communist Party, but these days everything seems to be made there, so there is always that risk. Are there any dealers / suppliers that are in that area where I can pop down? Or are there any recommendations? Also on the setup side of things I have 4 switches on my network, and where the external cat 5 cable runs into a switch depending on location. Each switch then has a separate connection to the router. I am guessing that with the cam. setup, it may be better to give the cameras a static IP address and start the DHCP pool further up? I can then input the static IP address of the cam into the DVR so it works correctly, or am I missing something. I will be getting my roof done at some stage, so when that is being done I will defo sort out the camera wiring situation properly and have redundancy built it, but this will not be for another couple of years. really appreciate your help. Many thanks. Share this post Link to post Share on other sites
Mark_M 4 Posted August 22, 2024 On 8/18/2024 at 7:40 PM, David Chan said: I need a system that has got high resolution, (4K, is this the same thing as 8 MP?) Do you really need 4K/8MP? Cheap cameras at 8MP tend to have very small cmos imaging sensor size (the thing which takes light and makes it into a digital image). Cheap & small imaging sensors work fine during daylight but tend to have terrible motion ghosting at night. A common cmos size in 4K cheap cameras is 1/2.7"... that's the size of a decent 2MP/1080P camera. A prober 4K camera should have near 1/1.2" cmos size. Zoom/Focal length is more important to capture an area. A higher 'mm' number is more zoom. E.g. 2.8mm typically 90deg FOV, 4mm ~80deg FOV. https://ipcamtalk.com/tools/calculators/focal/ (Focal length zoom depends on cmos size). Share this post Link to post Share on other sites
David Chan 0 Posted August 22, 2024 thank you so much for that, yes I am trying to improve my knowledge and there is so much to take on board. When I got my analogue system I didn't have a clue so done want to make the same mistakes again. Also I will be getting my roof done (huge project + expense!!!) so will be able to lay conduits down for CCTV final installation, but for now I need something working that is decent. A lot of the local installers insist on Hikvision , something that I have realised to stay away from. Share this post Link to post Share on other sites
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