Samsung Galaxy S9 plus has crazy camera with f/1.5. I would have bought one if I could afford it. By the way, have you tried any external camera lens on your Galaxy S7? There are wide lens, macro lens and fish eye lens.
I have the lens for my Asus Zenfone 3 Zoom, macro lens worked just great. I don't need any DLSR camera to have fun. If you want to take macro object, I suggest you to buy external macro lens for your smartphone.
Here is sample of my macro shot using my smartphone + Aukey Macro lens.
I was really thinking of getting some different lenses for my Galaxy S7 but now that I have a new phone coming I guess I will wait on that. The S9 plus has a dual camera and variable F-stop that is supposed to be able to do some really fun effects. Hopefully I won't need an external macro lens. I'm very impressed with the level of camera technology in smart phones.
Nice picture! Thanks for sharing.