Originally posted by tuco Ha, I beat you to it. I've wanted to try it for a long time now myself and I finally found a scene on a windy day to test it out. Better low angle light would have been nice instead of mid day.
Yes, with my one-degree spot meter it's easy. I just meter for the exposure without a filter(s) on the lens then rotate the EV dial on the spot meter counting out the number of stops put on the lens and read what the new exposure time is. Note, however, this is Acros. No reciprocity corrections were necessary. With most other BW films, you need to add even more time to your exposure and how much you add is dependent on your final exposure time. So on one hand Acros makes it easy not having to carry a reciprocity chart with you but in bright light it means more dense ND filters to get long exposure times.
Makes sense..... i think. Meter the scene, adjust the EV setting for 9 stops of light loss, put the ND filter in front of the metering lens and re-meter to see the new exposure time. Now I just have to get a larger threaded ND400 filter for the Hasselblad and figure out what kind adjustments to make depending on what film I am using. On a related note..... I am not real sure how the "green" shutter speed scale on the lens is used to calculate long exposures. As you can tell, my experience with long exposure on the Hasselblad is pretty limited
This photo is from a field that I have photographed a bunch of times as it is on the way to a friends house....might work for a long exposure MF photo, just got to wait for that breezy day.
Shot with a Hasselblad 500cm and C T* 80mm on Velvia 50