Chuck Hoffman wrote in article <342053B8.475A@swtech.com>...

> The purpose of the dome is to diffuse and evenly distribute the light
> falling on it. Ergo, it does not matter whether the dome is pointed
> toward the light source or toward the lens so long as the light falling
> on it is the same as the light falling on the subject (sun, shade,
> etc.). Only when you are reading reflected light -- without the dome --
> do you need to "point" the meter.

Hmmm, I don't think that that is necessarily correct, since the incident
meter dome is reading roughly a hemisphere of illumination, not the
entire sphere. If the light source and camera return angles are quite
different, reading toward the light source can give considerable error
compared with aiming the incident meter back toward the camera
from the subject position...
Hope This Helps
David Ruether - http://www.fcinet.com/ruether