I have used across developed with radinol and it looks very sharp to me. The blacks are nice and deep in studio. i get a very nice dark sky with red filter.

But PanF seems to have more shalow blacks and less contrast and not as sharp. Maybe if I try with a different developer?

Which developer whould you recomend for sharper results with PanF?

I guess the sky doesn't get as dark on PanF with red filter because its higher tonal range. Does ut makes sense?