i'm about to start shooting the project i started this thread for. here is what i've learned from asking about beyond this thread:
-do not clip off the cartridge notch
-set the filter switch to 'bulb' (tungsten light), disengaging the internal 85 filter
-attach an external 85 filter (it's a 62mm thread on a nizo 801 macro btw)
-use an external light meter and dial it in for a 500asa film
-take the f.stop reading from the meter and toggle the exposure setting on the camera to match this setting (as you see it in the viewfinder)
-the external 85b filter has a filter factor of 2/3 of a stop. open the iris a further 2/3 of a stop to compensate. this will not show automatically on the nizo 801 macro because the light meter is on the outside of the camera and not in the lens.
-shoot your film
that sound about right to people? or have i got that wrong?
from asking others, mainly people who have uploaded footage to youtube/vimeo, it seems that you can also use the automatic exposure setting with reasonable results.
-automatically the film will render at 1.5 stops overexposed.
-compensate by taking it down 1 stop (eg if you get a reading of f5.6 take it down manually to f8)
-dont take it down 1.5 stops because a little over exposure is preferable on negative film
-compensate for the external filter a further 2/3 of a stop
again, sound about right?
i'm going to shoot a roll with a variety of settings and post the results on here. i've spent so much time researching this that i think it should all be documented. that way anyone else with this setup will have an easier time than i have.
if anyone has any further input/has noticed anything ive got wrong please let me know.
ta