My pentax spot is out by 1 full stop. Today when shooting waterfalls with friends we were discussing exposure times, I seemed to be under by a stop so I checked my meter against 3 others. All agreed mine was under. Despite the 9 rolls of film in the lab at the moment that will all be under exposed, I shot another 3 this past week that will all be under also. For the moment I can meter, then expose 1 stop above the meter reading to compensate, but essentially I want the meter adjusted so I can trust it. Anyone have any clues as to where I can have this done?