Simple question about seagull camera! !

Press the button as shown in the figure, turn the lens counterclockwise and remove the lens.

However, the workmanship and accuracy of seagulls are poor, which requires strength. ?

If it is a second-hand machine, the button may have been screwed on and dropped. Then we can only find a screw instead,

The work of seagull lens? In particular, the accuracy of multi-head thread is too low, and it is normal to have looseness, which can only be solved by disassembly and repair.