In a world where Instagram has more users than the population of most countries, it's no secret that a phone's camera is often its selling point. Now, in a bid to win over some of that mammoth audience, phone manufacturer OnePlus has enlisted the help of photography experts DxO. Renowned for creating the respected camera benchmark system, DxOMark, the company is now helping the phone maker create a world-leading camera for the upcoming OnePlus 5.