Re: [APML] Viel exposure question...

["Don Westergren" <westergren@netzero.net>]

Jeff,

E200 and Provia400 have very similar light sensitivity and reciprocity.  See
my data at http://home.nethere.net/mpd/FilmTestData/FilmTestData.htm

Plus 2 processing will give you one honest stop of red sensitivity out to
4-1/2 hours exposure for 35 mm, a little less for 120 film.  I shoot 35mm
Provia400 with my FSQ106 for one hour.  Longer than that and I start seeing
sky fog from dark skies at Mt Laguna CA.  You will see brightness fall-off
toward the edges of your picture, so stay away from sky fog.

Clear Skies,
Don

>
> I'm trying to shoot the whole veil on 6x7 film.
> (This is using the FSQ-106 @f5, so the FOV is fairly
> wide..
> I dont have the exact numbers handy, but it easily
> covers
> the whole area twice.  By "area", I mean the
> waterfall,
> witches-broom, and the brighter, thinner, nebula to
> the
> south.)
>
> So I tried 20min-40min exposures of provia400F with
> std processing, from a fairly dark location, but not
> incredibly dark.  (btw, I'm not using LPR filters).
> Some detail, but not much on the fainter parts of the
> nebula.
>
> I'm thinking of trying E200.  Iirc, E200 suffers from
> less
> reciprocity failure.  Is this correct?
>
> In addition, I may need darker skies, with less
> skyglow, and expose
> for, say 60 minutes, then push+2.
>
> Does this make sense?  Or do I just have wishful
> thinking
> that I can get a decent image of this on film?
>
> jeff
>
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