Quote Originally Posted by Bill Burk View Post
That graphs under Stouffer scale step 11 which is 1.56 density.

So if you expose film that much less than the full 5 seconds at EV0, you will possibly get 1.0 density when developed.

1.56 divided by 0.3 is 5.2 stops...

So somewhere about a 1/4 or 1/8 second should do the trick...
How could I get that short of an exposure under the enlarger though? I don't think my timer is that accurate.