Camera Training

I was walking with two people, one older and one younger.  The younger man decided he was going to learn to use a camera that uses film instead of digital.  He explained that film cameras was a new trend.  He had recently bought a camera.  It was a twin lens reflex camera.  We were trying to figure out how to use a correct exposure.  The camera had a light meter on it but the light meter used an old fashioned metering system and did not match the film speeds.  I suggested he just get the closest match and see what happens.  The older man then started talking about film speeds and using the sunny day rule.  I pointed out he could not use the sunny day rule because the film speeds did not match the exposure setting on his lens.