The 4 cameras I mentioned in the other thread are all Amcrest, (rebranded Dahua, from what I understand.) all 2.8 mm focal length. 3 of the 4 are located at choke points on my property, Two are IP5M-B1186EW-28MM bullet cameras at $55, the other two are IP5M-T1179EW-28MM turrets which were $58. The turrets have built in microphones, the bullets don’t. And, turrets are supposed to be less susceptible to spider webs, which I occasionally experience on my bullets. These cameras I expect to be effective for me because their location is consistent with the DORI principle. Tomorrow I‘ll start testing with my new EmpireTech varifocal, which is 4 times the price of these cams, but needed for some of my other locations.