Quote Originally Posted by lxdude View Post
Usually the finger-flick on the shutter button trick will lock up (actually pre-release) the mirror on Spotmatics. As far as I know, that's true for any of the Pentaxes based on the Spotmatic design, including the MX.
I've tried this a few times and it released the shutter. I need to sit down without a roll of film in it and see if I can master that.