Doug I Printed in labs for years and found the nikkor lenses to be ok but not the best, to my liking. I prefer to use a computar enlarging lens or the fujinon ex series. You can get a decent print with most modern lenses but the above always gave me what I conceived to be the best quality. The computar is a really fine lens optically but they do tend to seperate in the rear group due to a manufacturing glitch. If you can find the computar 105 that is clear get one for 6x7 and if not try to find a fuji ex 105 or 90. I've tried all the others, meopta, comp, comps, rodagon, apo rodagon, nikkor, wolly, etc and was always reaching for the computar.