How do I check which torch accept this 28mm lens?

[GHOST]

Modding WF-501B!

I faced some problems here. Can I know how to disassemble the glass lens from WF-501B? It have silver ring that LOCKING it, make me unable to take that lens out and replace with a glass optics from DX. [image] And this, I want to know what is the black small piece of thing that looks like LED. What is it? [image] Thanks.