I think it is a professional picture! The web's vision is very clear, and the focus is good. The shadows of the background are nice and beautiful too. They don't disturb the frontgroung. The tine is fine too. The spider who made it, so talented in his / her work. The web is so symmetrical and it makes the photo more professional. You are so lucky if found this. I think none of the people can't create a thing like this and it is very difficult to take the best shot about it. But you did it!
I love your shot!