On Sat, 01 Jan 2005 18:29:56 -0800, Stefan Patric
wrote:

My guess is that you are using the meter incorrectly or the camera ISO
settings are not exactly equal to film ISO.

To meter properly with an incident meter you point the metering dome
toward the camera on the camera-subject axis.

I think that you should point an incidental meter toward the primary
light source (not the camera), while holding it at the location of the
subject.