Jay I understand what was in your mind! I believed if you do test all the 3 meters would read very close to each other (except their differences in calibration which is only 1/6 stop) including the reading with the flat receptor or dome in a well. I too have been wondering on how the dome in the well would work the same as the flat diffuser but I don't have doubt that they wouldn't work.
Originally Posted by jaydub
I hope that someone more knowledgeable to explain to us on how they behave the same and if there is any differences although small? My thought is that since the dome in the well and if the light is straight on then all the light would get into the receptor just like the flat diffuser. But if the light is obliged then only some of the light would enter similar to the flat receptor because light striking the flat surface at an angle is weaken.