I recently picked up a Canon TL for my son to learn he basics on. After buying a new battery for the light meter, I took it out for a test ride with a roll of Pan F. Here's the thing: The light outside was admittedly overcast, but I found that when focusing on a subject and moving between f1.8 and 16 on the Canon FL 50 mm lens, I really didn't get much response from the light meter. Only when I pointed in dark shadows or brighter light did I get any significant movement with repsect to the meter's needle and aperture. My question is: Was it the overcast day that was causing the lack of response or the meter? Should I trust it or have Jr. carry a hand held with him???