For scanning B&W (traditional silver) negatives, some people seem to prefer/recommend using RGB, rather than gray scale mode. Assuming a well calibrated scanner and a truly neutral (gray) negative (no purple tint and correct profile for the film base+fog) shouldn't all the color channels record identical reading ? If the dynamic range of a given channel is above that of the other two, I can understand the possible advantage of scanning in RGB mode and using that channel as the gray value (in which case, the gray scale scanning mode should be able to do the same on its own (use the most sensitive channel, rather than averaging the 3 color channels ?) The file size of an RGB scan is so much larger than gray scale that I would like to scan my negatives in gray scale if there is no clear advantage to an RGB scan. Thanks for any light that others can shed on this topic, Sassan.