Regarding the f/2.8 enlarging lens, in some printing, the increased speed of the lens is helpful if you are trying to maintain a constancy in the exposure time. It's not critical in b&w printing, perhaps, but in color printing it is. For instance, I have established a certain color filter pack for a type of color negative. My exposure time is 10 seconds at f/4. I wish to make a larger or more tightly cropped print, so I raise the enlarger. Now if I add exposure time, then the color filtration may go out of whack due to some reciprocity failure caused by longer exposure times. How sweet it is to open the lens a stop, maintaining the exposure time and how many test strips it saves and more time left for shooting! Ben
