I read everywhere about the sweet light, the color temperature of light, etc. Does the color of light make any difference with black and white. I mean does B&W really care if I shoot at dawn, or noon, or even at civil twilight? I know that the different times of the day give different shadows and angles. I recently went to a seminar on shooting flowers and the speakers made the comment about shooting only on overcast days or before dawn so that the light was mute, or at least using a diffuser to even the light if it is bright out. Does the quality of light affect the way that the tones of gray are represented from the real colors in a scene?