The student detaches the lens of the DSLR.
text: Detach the camera lens.
text: There is a black button, at the back under EOS.
text: A black button at the back of the camera.
text: Under EOS, on the left.
text: At the back of the camera.
text: Oh.
text: No, at the back.
text: At the back.
text: Left, left side, your left hand. There is a EOS.
text: Oh.
text: One hand, hold this button, and the other hand turn the red mark.
text: Alright.