I was shooting a group of roses - deep red - with lush green leaves around and behind the main subject. It was a low light/low contrast morning and had rained earlier, the flowers and leaves were showing rain drops. I metered on the green leaves and placed them on Z-V, the flowers fell about Z V-1/2. I wanted to use a red filter (#90, factor of 5) and opened up 2-1/2 stops. It was a close up shot and I wanted to use a shallow DOF to capture the Bokah in mid tones and the subject roses sharp and with *etched* detail. The exposure after filter factoring was 1/4sec @ f-4.5

The lens was Zeiss VS 80-200 at about 85mm.

The film was 35mm Pan F+ rated at EI 40.

The development was: small tank (one roll); DD-X 1:4; 22-c @ 5:30.

The results are: Blownout midtones - unprintable even burning at 2X base exposure. The subject roses look good and are quite interesting to me. They are in the area of my intent.

My questions come down to:
1) While trying to capture Bokah with a shallow DOF would/could luminosity be scattered to a point different than indicated by a spot meter (Pentax V)?
2) Did I simply process the film incorrectly?
3) Did I incorrectly apply the filter factor (factor of 5 = 2-1/2 stops)?
4) Given the subject to film plain distance of less than 1 meter should I have compensated for that in exposure also?

The weather conditions for today and tomorrow are the same as they were a couple of days ago (and weeks before that) when I took the picture and I would like to try it again.