RE: [APML] 4x5 color negative

["Loke Tan" <tan@cox.net>]

Rick, Jerry,

 Is Fujichrome Provia 100F available in 4x5 sizes? I have only seen
Fujichrome NPS 160 or NPL 160 (tungsten) for 4x5.

Loke


> -----Original Message-----
> From: astro-photo-bounces@seds.org
> [mailto:astro-photo-bounces@seds.org]On Behalf Of Jerry Lodriguss
> Sent: Tuesday, April 22, 2003 8:54 PM
> To: Discussion of Film Astrophotography
> Subject: RE: [APML] 4x5 color negative
>
>
>
> >No problem. I will have to use E100 and push it. Another thought
> I had was
> >to use Portra 400. I know it's peak response in not in the red but it's
> >speed is ISO400. So it would seem to be much faster than E100.
> Maybe I could
> >rebalance the color in Photoshop when I am done. Any opinions anyone?
>
>
> The Portra 160 and 400 might work ok for the blue and green
> channels, but I
> don't think it will work very well for the red channel because the red
> response is way down at 650.  The Portra 800 on the other hand looks like
> it peaks in the red response at 650, although the red is still less than
> the green and blue.
>
> You know, judging by the great results I've seen from people like Stephen
> Pitt ( http://www.light-to-dark.com/Rho.html ) and John Boudreau  (
> http://home.attbi.com/~jeboud/m42.htm ), I think the Fujichrome
> Provia 100F
> might be your best bet in 4 x 5.
>
> Jerry
>
> Jerry
>
> The book "Photoshop for Astrophotographers" is now finished!
>
>   Go to: http://www.astropix.com/PFA/PFA.HTM
>
>
>
>
>
>
>
>
>
>
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