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

["Brian Sledz" <brianhome@email.msn.com>]

Matt,
That is a great shot.  I like the subtleness of the Provia 400.  Jon Kolb's
shot had the same feel to it.
Brian
----- Original Message -----
From: "Matt BenDaniel" <matt@starmatt.com>
To: <astro-photo@seds.org>
Sent: Wednesday, December 12, 2001 8:17 PM
Subject: Re: [APML] Orion's Sword on 400F


> 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. However, 400F still failed to record the
faint red nebulosity that pervades this part of Orion; and I don't think
push processing would help (assuming a good scanner). I wonder if hypering
this slide film could extend its red response.
>
> Thanks to John Boudreau for his helpful comments, and to his tireless
efforts to test films.
>
> Also, I should mention that Jerry L's method of "Masking With Layers" (see
S&T 1/2001) is still the best way I know to eliminate burnout in slide
images. Interestingly, I didn't need to adjust the colors of the masked
layers at all. I think that means that 400F has virtually no differential
reciprocity failure.
>
> As much as I've moaned that 400F doesn't "cut the mustard", this is still
the best rendition of M42 I've done to date.
>
> At 03:08 AM 12/12/2001 -0500, Matt BenDaniel wrote:
> >http://people.ne.mediaone.net/mbendaniel1/gallery/astro/sword.html
> >
> >Here's a shot of Orion's Sword on Provia 400F. I think this shot shows
the following:
> >* Some lack of red sensitivity (but the sky's poor transparency might
also have been a significant factor).
> >* Because it's a slide film, the stars burn out easily.
> >* The graininess is pretty good for a 400 speed film, but not quite as
fine as E200's.
> >
> >These are consistent with John's Boudreau's findings. Based on these
findings, I am still looking for an excellent 120 astro film.
> >
> >BTW there are anti-vignetting artifacts in this image, a consequence of
PS's lack of 16-bit layers.
>
> --
> Matt BenDaniel
> http://starmatt.com
>
>
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