Quote Originally Posted by Helen B View Post
does changing the film speed setting on a meter make it any more sensitive?
I know from experience that my Sekonic L-358 will not offer readings at low ISO settings, but if you alter the ISO it will provide a reading. It's probably not that it's any more sensitive, but that it doesn't offer exposure times longer than 30 minutes, so it will opt out of any ISO that requires a longer exposure than that.

This meter, while wonderful in the daylight, will only give reliable spot or incident readings down to Ev 5 and reliable reflective readings down to Ev 2 or 3.