I'm looking to buy a fully-mechanical film camera (metering reliance on battery power is fine) to use in extemely cold weather. By "extremely cold weather", I mean as low as -40 degrees Celsius. According to Wikipedia , the FM2 is rated to operate properly from -40C to +50C (wow!) due to it's "close tolerance assembly and minimal space lubrication". Since the FM can be found for a reasonably lower cost, I'd rather look for an FM before I would an FM2. Does the FM share these same construction features to operate as reliably as the FM2 in cold weather?