To add to this: search the catalog of whatever access control / electronic security wholesaler is local to your country. Almost all stock IP CCTV cameras and peripherals, and it's an easy way to get an idea of what manufacturers produce the cameras you need. Panasonic and Hikvision cameras are also quite good for a more reasonable price than Axis, but I'd agree with the above poster that they are the gold standard in IP CCTV.