We recently Purchased a 4 camera security system for 1500 installed for our towing company with a huge impound yard. We were told that we would have good qaulity, motion activated, and IR. well we got the motion activated and IR. We do not have quality at all. cant make out who is who or reading. its all blur realy. they have been focused in. the DVR is a channel vision 4c. the cameras i do not know what they are. they are shaped like a dome but doesnt have the glass/plastic around the lense. Now here is my big question. Is there a way to buy a camera at a reasonable price (100ish) that will give us a good quility or would we have to upgrade the dvr and all. I need motion, and IR in these. anyone know were i could get it from. Also we should of had atleast 6 cameras. now im just gonna ask this for the hell of it. is there a hub or anything that we can get to help get more cameras. If not anyone have and advise what to do. I have a few blind spots because i had a choice to point the camera one way or the other. were on a tight budget as we got ripped off with this system. We have only had it for about 3 weeks now. I have been reading other posts but havent gotten my question answered if i can upgrade the cameras for better picture or gotta upgrade both. Thanks for reading this and forgive my spelling.