When do we need the cameras to perform? At night for most of us! Almost any camera is sufficient in the daytime (almost there are still lots of cloud based cameras to avoid for example).
See this post that goes over it in more detail and provides reviews of all the common Dahua cams and you can see the differences for yourself:
Hi, Playing around with a single loaned Dahua cam and the trial version of
Blue Iris. I bought the app for iPhone, but I think I've discovered it doesn't work with the trial version? I feel pretty confident about setting the port forwarding up, as it all appeared correct and canyouseeme saw...
ipcamtalk.com
But the next thing you need to worry about is getting the right camera for the right location.
You would be shocked how close someone needs to be to a 2.8 lens in order to ID them. And how much additional light is needed at night (when it matters most) for a 4k camera. There currently isn't an economical 8MP/sensor combination at the moment that any would recommend.
Take a look at this chart - to identify someone with the 2.8mm lens that is popular, someone would have to be within 13 feet of the camera, but realistically within 10 feet after you dial it in to your settings.
My neighbor was bragging to me how he only needed his 4 2.8mm fixed lens cams to see his entire property and the street and his whole backyard. His car was sitting in the driveway practically touching the garage door and his video quality was useless to ID the perp not even 10 feet away.
When we had a thief come thru here and get into a lot of cars, the police couldn't use one video or photo from anyone's system that had fixed 2.8mm or 3.6mm cams - those cams sure looks nice and gives a great wide angle view, but you cannot identify anyone at 15 feet out. At night you cannot even ID someone from 10 feet. Meanwhile, the perp didn't come to my house but walked past on the sidewalk at 80 feet from my house and my 2MP varifocal zoomed in to a point at the sidewalk was the money shot for the police that got my neighbors all there stolen stuff back. Reolinks are even worse at night - he tried those first and sent back to get Arlos....and a year later he is regretting that choice too.
In fact my system was the only one that gave them useful information. Not even my other neighbors $1,300 4k Lorex system from Costco provided useful info - the cams just didn't cut it at night. His system wasn't even a year old and after that event has started replacing with cameras purchased from
@EMPIRETECANDY on this site based on my recommendation and seeing my results - fortunately those cams work with the Lorex NVR. He is still shocked a 2MP camera performs better than his 4k cameras... It is all about the amount of light needed and getting the right camera for the right location.
My first few systems were the box units that were all 2.8mm lens and while the picture looked great in daytime, to identify someone you didn't know is impossible unless they are within 10 feet of the camera, and even then it is tough. You are getting the benefit coming to this site of hearing thoughts from people that have been there/done that.
We all hate to be that guy with a system and something happens and the event demonstrates how poor our system was and then we start the update process. My neighbor with his expensive arlos and monthly fees is that guy right now and is still fuming his system failed him.
Here are my general distance recommendations, but switch out the 5442 camera to the equivalent 2MP on the 1/2.8" sensor works as well.
- 5442 fixed lens 2.8mm - anything within 10 feet of camera OR as an overview camera
- 5442 ZE - varifocal - distances up to 40-50 feet (personally I wouldn't go past the 30 foot range but I like things closer)
- 5442 Z4E - anything up to 80-100 feet (personally I wouldn't go past 60 feet but I like things closer)
- 5241-Z12E - anything from 80 feet to almost 200 feet (personally I wouldn't go past 150 feet because I like things closer)
- 5241-Z12E - for a license plate cam that you would angle up the street to get plates up to about 175 feet away, or up to 220 with additional IR.
- 49225 PTZ - great PTZ and in conjunction with an NVR or Blue Iris and the cameras above that you can use as spotter cams to point the PTZ to the correct location to compliment the fixed cams.
You need to get the correct camera for the area trying to be covered. A 2.8mm to IDENTIFY someone 40 feet away is the wrong camera regardless of how good the camera is. A 2.8mm camera to IDENTIFY someone within 10 feet is a good choice OR it is an overview camera to see something happened but not be able to identify who.
Main keys are you can't locate the camera too high or chase MP and you need to get the correct camera for the area trying to be covered. A 2.8mm to IDENTIFY someone 40 feet away is the wrong camera regardless of how good the camera is. A 2.8mm camera to IDENTIFY someone within 10 feet is a good choice OR it is an overview camera to see something happened but not be able to identify who. Also, do not chase marketing phrases like ColorVu and Full Color and the like - all cameras need light - simple physics...
The best advice we give is purchase one varifocal camera and test it at each location you want to install a camera and confirm the lens you need.
www.secutech.com.au
