The student detaches the lens from the DSLR.
text: That's the lens cover, atach it again.
text: And on the left side of the lens, it should be a button that you should hold and then rotate the lens.
text: It's on the left side of the lens, the one at the bottom.
text: And then rotate the lens to the left.
text: Rotate it to the left again while pressing the button.
text: You might have to move- okay, the left, maybe try the right side.
text: Nice, well done.