IMHO unless you are doing ultra-high res work, lithography, micro-dot photo
enlargements or the like you'll spend more time spotting prints than making
prints. For pictorial subjects, portraits, landscapes, etc. I prefer a
diffused light source--have used Omega-Sphere-D, Aristo cold lights, and
various dichroic heads for assorted enlargers. On the other hand--if you
are using Technical pan film or ohter ultra high resolving films it MIGHT be
fun to play with and not too expensive to get into--it's a buyers market--if
you know what I mean.
Mike
>Thanks Mike,
>
>I'm starting to get a rough idea of what we're talking about. These
>seem to be specialty sort of devices. If you were building a 4x5 camera
>using ex-military aerial reconaissance lenses and high accutance film
>for very high resolution work, would you even consider one of these?
>
>Gene
>
>Michael King wrote:
> >
> > Used a point source 25 years ago when printing glass slides on a 4x5
> > enlarger--talk about dust!! For the "normal" darkroom a diffused light
> > source practically eliminates dust spotting, a condenser light source
>will
> > give you enough spotting chores to keep your hand in and a point source
> > would be the only thing I can think of that would keep me completely out
>of
> > the darkroom!!!!
> >
> > Basically a point source light head uses a small, clear bulb, mounted on
>a
> > socket that moves up and down in the lamphouse of the enlarger head, the
> > idea is to focus (colliminate(sp?)actually) the light moving through the
> > negative so that the light rays are perfectly alligned with the plane
>and
> > aperture of the negative stage. Any dust on the surface of the negative
> > will be razor sharp on the print. Any scratches will look horrible.
>Print
> > contrast will be higher and negative grain will be quite apparent.
> >
> > darkroommike
> >
> > >In a message dated 5/15/01 8:47:30 PM Central Daylight Time,
> > >[EMAIL PROTECTED]
> > >writes:
> > >
> > >
> > > > Thanks Junkman,
> > > >
> > > > I think I would like to know more about this "point source" idea.
> > > > Anything more to add?
> > > >
> > > > Gene
> > > >
> > >
> > >Dear Gene:
> > >No, sorry to say. I have never used point source lighting in any of my
> > >enlargers. I read about it somewhere, but that was a long time ago, and
>I
> > >can't remember the details now. But I'll bet someone on this list can
>tell
> > >you all about it.
> > >Sorry I can't be of any more help on this subject. Best of luck to you.
> > >Sincerely:
> > >Junkman
> >
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