RE: [APML] Agfa Optima II and Fuji NPH

["Patrick Freeman" <pfreeman@woh.rr.com>]

Oh, NO!  Now I'm really worried.  I recently acquired 10 rolls (2 5-packs)
of the NPH and although it doesn't say "New" on it, now I'm seriously
worried that it's no good.  The roll I tried 2 weeks ago with good results
was a single roll from a prior purchase.  Guess now I need to sacrifice a
roll of the 10 to see what it's like.  Thanks for the heads up!

-- Pat Freeman


-----Original Message-----
From: astro-photo-bounces@seds.org [mailto:astro-photo-bounces@seds.org] On
Behalf Of August R. Orlandi
Sent: Thursday, April 17, 2003 20:06
To: Discussion of Film Astrophotography
Subject: Re: [APML] Agfa Optima II and Fuji NPH

Fuji NPH 400 has been redone.If it has NEW
on the box forget it.
This film has very little red sensitive to it.
Another one down the tube.
Augie
----- Original Message -----
From: "westergren" <westergren@netzero.net>
To: <astro-photo@seds.org>
Sent: Thursday, April 17, 2003 4:47 PM
Subject: [APML] Agfa Optima II and Fuji NPH


> Both of these films are in production and available as both 35mm and 120
> roll sizes.  I lab tested both films in the 35mm size and rated them as
> acceptable on a good-acceptable-poor system.  I thought I would tell a
> little more about each film here.
>
> The Agfa Optima II 400 is at least a full stop less sensitive to all
colors
> compared to good Supra 400.  The Agfa responds slightly (about 1/2 to 1
> stop) to hypering in the red, but hypering increases the green by 2 to 3
> stops and the blue by over 3 stops out to 4-1/2 hours exposure.  This
means
> hypering will throw the color balance way off.  Unhypered, the film seems
to
> have good color balance and will produce decent astrophotos, but require
> much longer exposures to achieve the same image as Supra 400.
>
> Fuji NPH 400 is slightly more red sensitive than the Agfa, and has good
> color balance unhypered.  The NPH doesn't respond much to hypering.  Red
> response actually gets slightly worse with hypering.  Blues and greens get
> slightly better with hypering, but that only tends to shift the color
> balance more green-blue.  Like the Agfa Optima, the Fuji NPH will take
> decent astrophotos unhypered, but require longer exposures to achieve the
> same image as Supra 400.
>
> The film comparison Pat Freeman has on his web site shows that NPH can
> record a very nice picture of M42, just as good as with Supra.  His
> comparison of Supra and NPH on M20 shows (to me) that the blue response is
> way down on the NPH.
>
>
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>



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