Traduzione in corso passo 1
It's difficult to remove this bottom bracket. The inside round edge of this bracket seems to be soldered with camera lens ring; so you need much more effort and it's not surprising to break the bracket altogether.
I like to take a flat screw driver and push it in where it wont damage any components and just pull until I hear small tears.
Thats where the soldering have happened, you can also see it in picture three.