Helios-44M-7, how to remove letter-ring?

[Lucse]

Hi, I am need of some help (again).

I am unable to remove the front-ring of a Helios-44M-7 (the ring with the letters on it, I do not know the exact term for it).

I can make it turn but it does not unscrew. It keeps on turning without end.
It is possible to lift this ring at one side but it doesn't come of. And I am afraid to brake it if I use more force.

So does somebody know what the trick is to remove this ring?

Thanks in advance for all possible help.

Edit: after fiddling with it for more then an hour I somehow managed to get that ring of.
I do not know if I would be able to do it a second time and I still do not have a clue what kind of trick should be used to get it of easily.

The ring is made out of plastic and at the back it's has 12 small flat 'dents' sticking out with a small wider section at the top of them.
So that ring simply clicks over a metal ring inside the lens. And the dents hook over that ring.
Very simple to assemble but practically impossible to take it apart again.

I hate those kind of systems...

[aidaho]

Yeah, you've figured it out: it's a clip-on rather than a screw-on plate.
The good thing about them is they can't be jammed and render lens unserviceable, the bad: they love to break.

Also, some of the clip-on plates sit so close to the front lens, removing them feels a bit like defusing a bomb.

Good luck with your lens service!

[Lucse]

[Alethom]

Hi, I'm having problems with that lens too. My focus ring twists without affecting lens movement and so the focus is stuck at around 4-5 meters...

What should I do?