I shoot film and would like to know how to calculate long exposures (agnostic of reciprocity
) for exposures under 2 minutes using 100 slide film.
I am not asking about reciprocity.
Obviously, I plan to bracket my exposures but to get +/- 1 stop is it better to use a heuristic-based chart like this for determining my EV or should I rely on my Sekonic meter?
It seems that there is quite a large delta between what the meter says the EV is and what the chart(s)
suggest it should be. The meter indicates a significantly lower EV.
I question which method is best and do not want to waste $$$ on film and dev to figure this out. Some say that it is better to not use meters but to use the heuristic-based charts (presumably because highlights will be too intense if a lower EV is used). Yet, I can't get my mind around the meter be the incorrect way to determine the EV.