What do you mean by taking a camera? Answer +30 points.

You mean the lens collided with the reflector! I use Canon's machine myself, so I know it better. To put it bluntly, some old lenses will still collide with the camera mirror after being changed.

For the lens of the board, either change the back of the lens or change the small reflector, but some people say: it is recommended to transform the reflector. Because the fuselage depreciates quickly; And the lens is slowly depreciating. Destroyed the back of the lens, and the value dropped even more.

Mowgli Forum has a detailed post about replacing the camera mirror, and the landlord can have a look if he is interested!

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