<span class="link_user">@Lemonhazelover</span>, it is one of those cheap chinese ones for your mobile phone (APEXEL 200). But i wouldnāt recommend it. You have to get pretty close to your flower to get any picture at all. Basically touching it.
<span class="link_user">@DavidRayMan</span>, thanks! I am adding a lot of N with the Sugar Royal. I am also using the Plagron Royalmix with the advised nutirent schedule, which explicitly mentions that is not necessary to adjust ph. Your Papaya looks indeed a lot greener. Let's hope it is just picture quality :)