I think everyone is on the right track and thanks for
the advice. I guess I'd better just find some bulbs
and do some experimenting.
Thanks,
Matt
--- Robert Stoddard <[EMAIL PROTECTED]> wrote:
> Hi Gene,
> There is no doubt that some of them are visually
> much more white-looking
> than others, due to newer phosphors. Whether they
> are good enough for
> variable-contrast papers to be used without
> adjustment of printing time, and
> whether the full range of contrasts can be gotten,
> can only be determined by
> trying them. There is also the problem of changing
> light output with
> warmup. Maybe it might work better to have a lens
> cap that you remove to
> make the exposure so that the fluorescent light
> source could be fully warmed
> up before exposure.
> Bob S.
>
>
> >From: Gene Johnson <[EMAIL PROTECTED]>
> >Reply-To: [EMAIL PROTECTED]
> >To: [EMAIL PROTECTED]
> >Subject: Re: [Cameramakers] Speed Graphic
> Enlarger/spectral trouble
> >Date: Tue, 19 Jun 2001 06:59:24 -0700
> >
> >Robert,
> >
> >You know,I think that may be changing. These bulbs
> seem very white.
> >Much whiter than other flourescents I've seen in
> the past. I'm seeing
> >other flourescents like this now too. I'm wondering
> if there has been
> >some improvement in the technology. Kind of hard
> to tell with the eye,
> >but I think some of them even mention "full
> spectrum" or something
> >similar on the packaging.
> >
> >Gene
> >
> >Robert Stoddard wrote:
> > >
> > > Hi Matt,
> > > The problem is that fluorescent lamps don't
> have a continuous spectrum
> >of
> > > colors of light as a hot filament lamp does.
> This probably would not be
> >a
> > > problem if you are using single contrast-grade
> B&W enlarging paper,
> >since it
> > > would only affect the time required to print.
> If using multi-contrast
> > > paper, it might cause some trouble because of
> the fact that the color of
> >the
> > > light must be changed to get the different
> contrasts.
> > > RkS
> > >
> > > >From: Matt Mengel <[EMAIL PROTECTED]>
> > > >Reply-To: [EMAIL PROTECTED]
> > > >To: Cameramakers
> <[EMAIL PROTECTED]>
> > > >Subject: [Cameramakers] Speed Graphic
> Enlarger/spectral trouble
> > > >Date: Mon, 18 Jun 2001 07:18:41 -0700 (PDT)
> > > >
> > > >Thanks to everyone on the speed graphic light
> head
> > > >stuff. I think I have enough info to get
> started BUT,
> > > >there have been some concerns here as to
> spectral
> > > >problems with different light sources. Can
> anyone shed
> > > >some light (sorry) on what the problem(s) would
> be. I
> > > >am not at all familiar with this. If I used a
> source
> > > >with the wrong color temp. what would happen?
> I'm
> > > >speaking in the B&W sense of course.
> > > > Also, I mentioned earlier the Ansel Adams
> book, "The
> > > >Negative". After I actually READ the book
> instead of
> > > >just reading captions, I got a little more
> insight on
> > > >the type of enlager he was describing. If
> anyone is
> > > >interested just about any library has this
> series.
> > > > Thanks
> > > > Matt
> > > >
> > >
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