Why do most if not all security cameras have such bad quality?

Question

Phones nowadays have cameras that are so perfect in quality, yet security cameras are mostly always so grainy so why? You can get a phone with a perfect extremely high quality camera for a few hundred these days, sometimes even less

In: 139

Answer 1

Would a higher quality sensor overheat if constantly recording? I borrowed someone’s dSLR that had video and it could only take 2-5 minute clips before stopping recording due to overheating.