Hello Charlie,
The thing is though, there is a another version of the M that takes a 6v battery (and has a mesure lock where the on/off button is) that does say it can measure 1/50s after 30m in the manual, which, is why i'm confused as to why your's and mine both don't measure 1/50s.
Cool snoot! Would you also happen to know how much compensation i'd need if I shot 25fps?