"Mike" wrote in message
m...

Yes. Around f/5.6 or f/8 for faster or slower lenses respectively.



To get reasonable printing times of 8s or so, I have to print at f11 or
f16.
Anybody know if they sell ND filters for enlargers?

Despite what some have said, f/11 has just as good resolution (even with
diffraction limitation) as f8 on many lenses.

But check with B&H Photo. You should be able to find a large unmounted
filter that you can cut down to size.