Lorex and Amcrest are both made by Dahua but usually have things stripped from them compared to the Dahua counterpart.
Don't chase MP and FPS. As of right now, It is simple LOL - do not buy a 4MP camera that is anything other than a 1/1.8" sensor. Do not buy a 2MP camera that is anything other than a 1/2.8" sensor. Most 4k are on the same sensor as a 2MP and the 2MP will kick its butt all night long... These cameras are 8MP on a 1/2.8" sensor and will not perform well at night unless you like blur.
Keep in mind that these cameras, although are spec'd and capable of these various parameters, real world testing shows if you try to run these cameras at 30fps and high bitrates that you will max out the CPU in the camera and then the camera bugs out just long enough that you miss something. My car is rated for 6,000RPM redline, but I am not gonna run it in 3rd gear on the highway at 6,000RPM...same with these types of cameras - gotta keep them under rated capacity.
Look at all the threads where people came here with a jitter in the video or IVS missing motion and they were running 30FPS and when people tell them to drop the FPS and they dropped the FPS to 15FPS the camera became stable.
Movies for the big screen are shot at 24FPS, so I don't think we need 30FPS for our phones, tablet, and monitors at home LOL. 15FPS for surveillance is fine.
Plus I doubt your NVR is capable of passing that much data - NVRs from the box units like a Amcrest and Lorex cap out incoming bandwidth (which impacts the resolution and FPS of the cameras). The Lorex and Amcrest NVR maxes out at 80Mbps and truly only one or a couple cameras that will display 4K. My neighbors was limited to that and he is all upset it isn't 4K for all eight channels and he was capped out at 4096 bitrate on each camera so it was a pixelated mess. Your NVR in all likelihood will drop the resolution, FPS, or bitrate to what it can handle. He got a camera that could do 60FPS but the NVR couldn't handle it.
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 4k 2.8mm or 3.6mm fixed lens 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.
In fact my system was the only one that gave the police 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 and motion was a blur. 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.
