Something Iphone users don't know any more, at least the ones using the newer versions, the 3.5 jack connector. As I am not a Apple (phone) fan as I prefer the Android system for my phone I still can use my jack powered ear pieces for music listening. And with my new Samsung phone I got some great AKG headphones with a 3.5 jack, in fact this is a shot of that jack. Took this shot using all three macro extension tubes and two external led light sources pointed away from the subject.
Still playing with the tubes some times and I must say I am getting more and more pleased with the results.
Have an amazing day!
Camera: Nikon D5500
Lens: Nikkon 18-55mm f/3.5-5.6 VR
Macro extension tubes