When you buy something, that does'nt work, before trowing it away, make some photos!
This is my first try with my new extension tubes, that allow me to approach with the 70-200 to almost 10cm, instead 150cm (4inch/60inch)!
You will notice much "dust" on the wheel. Well, it was very hard to getting rid of it, i think there was a static charge. And then i found the dust just interesting
Room was completely dark and i "painted" the subject with a hand held torch.