Thanks for your responses.  It's 160 Tungsten and 200 D

On Wed, Jul 24, 2019 at 5:51 PM Scott Dorsey <klu...@panix.com> wrote:

> > I am not getting it. Is 200 ISO the native speed of the film? Or is it
> 160 ?
>
> It is both.  The film is less sensitive to red light than to blue light,
> so if you expose it in red light, the effective ASA is lower.  If you
> are exposing with tungsten light, you use 160 ASA, while if you are
> exposing
> with daylight, you use 200 ASA.
>
> > Most Super-8 cameras have an orange filter for daylight.
> > But for b&w one would always open the filter right?
>
> Right, you disable the 85 filter.  It's a bad idea in any case.
> --scott
>
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