Camera lens glass broke, the camera's lid can not get down
Second, ask a friend to help, one hand tighten the lens, one with both hands with two pointed nose pliers or tibble pliers close the UV frame anti-clockwise remove the UV lens, of course, still very careful. In addition, the UV frame may not be deformed, then this step can be easily removed with one hand.
specific method:
First, with a tilted nose clamp carefully cut off the lens cover, the action should be light, do not vibrate the lens, so as not to UV lens fragments on the lens harm.
It is recommended that you immediately under the lens cover, otherwise the broken UV mirror glass may scratch the lens.
From the question you talk about the situation, I guess the UV lens is broken, the lens has no damage that depends on the lens cover to see, but at least not broken.