Alright, I don't want to be hoodwinked...!!!
I'm a film student in DC and im shooting a project this weekend...the director is really putting his confidence in me and I don't wanna mess anything up! I've reserved a set of 85 and ND filters from the school (shooting 7218 500T)...one of the filters is an 85+ND3 filter, now from research I know that the 85 filter cuts down 2/3 of a stop and an ND3 cuts 1 stop. So I concluded that using this combined filter, I would add these two factors together and get a 1 and 2/3 stop cut off. But the equipment guy at school told me that the 85+ND3 filter cuts down 1 stop of light (that the combined factors of the filter just added up to 1 stop)
Now I just read on the kodak website that 85ND3 cuts down by 1 and 2/3...whew!!!
So, I just wanna know from all you great DP's...how much light does this filter really cut?
And also how would I calculate the factor by doubling up and using a seperate 85 and seperate ND filter on the lens?