I just purchased a NN3MkII to use with my Nikon D50 and Tokina 12-24mm lens.
Does anyone know where the entrance pupil is on that lens?

I couldn't fine a setup guide on the website.

Is it always more or less the golden ring? If so, then my camera can't go back enough to reach it.

I also noticed that i can't rotate my camera all the way up so that it faces straight up.

Any help is appreciated!