With Ali offering imx293 bare bone units for under 20$ I wanted to get one to test as an lpr. Hunting down a good resolution 50mm had been all but impossible.
i buy my lenses from treeye and fulekan on aliexpress - not gone to 50mm as yet up at 25mm on el cheapo starvis cams, for the price its awesome for my purpose.
i just plug my 2mp cameras into a cheap hik hiwatch nvr and use onvif for them
i have a seperate hik k2 nvr for my main cameras, so use its VCA for spotting on events in the middle of the night, @ 30m plus then el cheapo cams light up the crims nicely