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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