As others have said, you get what you pay for. I went down this rabbit hole a year or so ago. There is a dedicated forum but you will see particular issues with it/the owner on Reddit.
My general learnings:
Think about what you want to achieve with the system before spending a tonne of money.
Hard wired cameras are king. WiFi cams can drop out or become pixilated when there is movement in the scene because (as far as I am aware) none of them buffer the video to the internal SD card.
Sensor size is important than MP. In poor lighting, a 4MP sensor will produce a better image than 8MP.
Always look at the video quality recording movement, most of these cams will take great still images when the scene is stationary. It is motion what you want to record.
Whatever you get, isolate it from the internet to stop it phoning home and or being hacked. Use a VPN to access, never port forward.
Donât overestimate the abilities of the camera. Most âbetterâ cameras will have a DORI rating (detect, observe, recognise, identify). Like ANSI throw rating for flashlights, this is for ideal conditions and should be treated as a metric for comparing products rather than gospel. As field of view increases, the distance you can identify a person rapidly decreases. Varifocal cameras are popular reccomendations to start with so you can âdial inâ the correct field of view for each location.
Do look for the minimum focal distance, to check the camera is suitable for your purpose.
For identification, donât place the camera too high, else youâll just record the tops of peopleâs heads; treat your security cameras like âcamera trapsâ- you want to position it on a âgame trailâ and at a good angle. Overview cameras can obviously be higher, but you wonât get enough pixels of someoneâs face once you zoom in, to allow you to identify them.
A popular reccomendation is a chap called Andy who runs the website EmpireTech. He sells mostly rebranded Dahua cameras.
There is software to help you design placement and focal length of a camera system but these cost money so I just did a scale âfloorplanâ of my house, then drew on the horizontal field of view and used a compass to draw the âIdentityâ distance of the cameras. Do stand in the proposed location and think about what you want to see from that point, I need to move one of my cameras, I initially thought it would be good to watch the driveway, but Iâve now realised there is a blind spot behind the car when itâs parked, moving it across 1.5m will solve this problem and also better cover the access towards the front door.
Not going to get into what recorder or software, as Iâm still figuring out my final setup.