Hi Bartian.
Your exercise with the camera sounds interesting 🙂 … at one point I had a flash light glued to my camera 🙂 .. It looked a bit weird, but any trick goes.
I like your photoes, – the ones of the little one is really good.
I have to say, I would really think those quindecims are two males. I know the female quindecim shows some pattern and some colours, but mine usually looks like this https://parosphromenus-project.org/en/quindecim.html (last two images ) .. infact those are mine 🙂