I suppose you back-lighted those 10 gels? That method may workOriginally Posted by Walter Glover
well with my 8 degree L-228 Sekonic and many of the camera based
meters in spot mode. I'd think those 10 ND gels cost something?
Perhaps a point light source and measured distances will work
well. I think a clear filament bulb against large dead black
background worth a try. Any opinions? Dan