With information of Mark Roberts and Bojidar Dimitrov, I wrote a page on the modification of the lenses K to use matrix metering on: http://perso.wanadoo.fr/krg/ (in French)
The MZ/ZX-30 and MZ/ZX-50 have problems of compatibility with lenses no A or FA. Has anybody tried this modification while isolating contact A, would it be maybe THE solution??? Bonjour de France, Michel