ISO 300 - 5 stops = ?

[ped]

Hi guys

As per title. I have a Polaroid 195 which takes lovely ISO3000 B+W film. I also have a 5 stop ND for the lens, to enable me to use the film outside. What ISO will that bring the film down to exactly?

Cheers
ped

 

[Nawty]

3000 1500 750 375 187.5 93.75

So, about 90.

 

[ped]

Great, thanks. That's about what I thought.