Re: The Mighty K2

[Michel Carrère-Gée]

...
I have a pair of K2s; each has two idiosyncracies in common. Both have 
difficult to turn ISO rings. ..

It happens that the ring of adjustment is blocked; my tip of repair 
(French!)

http://perso.wanadoo.fr/krg/trucs/reparations.htm#bague

Michel