Re: [APML] Orion's Sword on 400F

["John Boudreau" <jeboud@mediaone.net>]

> John Boudreau hypered a roll of 400f- he said it lowered the blue
response,
> and did nothing for the reds. This is typical for slide film- there hasn't
> been one yet that benefits from hypering

That's about right Sean. I hypered for 2 hrs at 50 C (hand pump setup) and
the test subject was M27. The camera was purged by a dry-air system. But the
test was a poor one because the hypered exposures were compromised by thin
clouds and even some fog. My ST4 chip even frosted over ;o(

The unhypered exposures had been shot the night before in good conditions.
The hypered 400F actually did show marginally better reds, and as you said,
the blue suffered. Green appeared about the same but *may* have been just a
bit stronger on the hyped film. Sky background remained neutral. But this
change in balance was subtle and may just have occurred only due to the
conditions, and the results weren't interesting enough to bother to try
again. Because the test was so compromised, I didn't bother to report it to
this list.


John Boudreau
jeboud@mediaone.net
http://people.ne.mediaone.net/jeboud/astro.htm
----- Original Message -----
From: Sean Walker <vze2c3z8@mail.verizon.net>
To: <astro-photo@seds.org>
Sent: Thursday, December 13, 2001 9:07 AM
Subject: Re: [APML] Orion's Sword on 400F


> John Boudreau hypered a roll of 400f- he said it lowered the blue
response,
> and did nothing for the reds. This is typical for slide film- there hasn't
> been one yet that benefits from hypering.
>
> Sean Walker
>
> > From: "Bobby Middleton" <bobm@koyote.com>
> > Reply-To: astro-photo@seds.org
> > Date: Thu, 13 Dec 2001 07:44:25 -0600
> > To: <astro-photo@seds.org>
> > Subject: Re: [APML] Orion's Sword on 400F
> >
> > That is a better version Matt, but I would pull the green and blue
channel
> > down a hair in curves. And the sky background color is still a blue cast
> > after that. I wish we had some hypered results. Any takers?
> > Bobby Middleton
> >
> >> From: "Matt BenDaniel" <matt@starmatt.com>
> >>> I significantly adjusted this image.
> >>>
> >>> Most importantly, I figured out a way to get rid of the
anti-vignetting
> >> artifacts in Photoshop. AFAICT there are no significant AV artifacts
left
> > in
> >> this image. I think I can do this with any image now. At some point, I
> > will
> >> overhaul my AV article to include the refinements to the technique.
> >>>
> >>> Also, I saturated the colors somewhat. I don't normally do that, but I
> >> think maybe that 400F does not yield vivid colors (as does its sibling
> >> 100F). The nebula looks redder now.  I wonder if hypering
> >> this slide film could extend its red response.
> >>>> http://people.ne.mediaone.net/mbendaniel1/gallery/astro/sword.html
> >
> >
> >
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