It's the thing that you can put the camera shot in this thing , then tie on the tree or something you want to tie. Why I want to make this thing? One day, my friend took a photograph which is a bird to catch a fish at the moment. He said he try many time but just one time success. He also invest his time and energy in order to this photo. So, I want to make this thing. Tie the camera shot on something you want to tie. You can take a photo and do other at the same time. It's will become more convenience to survey the nature. But...it has some false when I make it real. The thing in the computer is exact. However, I didn't expect the crack must be more bigger than the real one in computer. So, the size isn't exact....so it can't be use. I will try many time until it successd.