Polaroid Reciprocity

I was wondering if anyone could help me with Polaroid Reciprocity. I just
recently started shooting with a Santa Barbara (2 inch Super Wide) with a
Polaroid back. Right now I'm shooting with Polapan 400 B&W (72). I've done
most of my shooting outside and the exposures have all been less than six
seconds. I wanted to try shooting inside under much lower light. I'm just
not sure how much I need to compensate for reciprocity. I checked out the
info on Polaroid's site, but I'm still a unclear.
Has anyone else shot with this film or a similar film that could give me an
idea of how much time to add.
The shot I want to shoot right now, by my calculations is about 2 and a half
minutes without compensating for reciprocity.

Thanks in advance for your help.

Jason Russell
WISH-TV
Indianapolis, IN

"If you go any faster we're gonna travel back through time."
Received on Mon Oct 28 10:41:07 2002