whwiden wrote:
If you were using a warming filter and not a true red filter that may explain the lack of contrast in some of the sky shots. A true red filter can be extreme in its effect and will knock off 3 stops of speed which can be tough with Pan F. If I had to use one contrast filter it would be yellow-green, then maybe an orange. Most pick yellow as a first black and white filter but the impact is often small.
The red filter was 3 stops of light loss...I was checking with my sekonic 478 to make sure my in the meter in the Mamiya was reading correctly.