A few years ago when I built my 5x7 camera I made a light head using 5- 9"
florescent bulbs and for the power supply I went to the Thomas Register and
found a manufacturer of florescent ballasts and talked with an engineer and
told him what I wanted to do and he told me which of their ballasts would
work for this arrangement and even sent me an engineering sample. The head
was made to fit on a D2 Omega. I still have the light head but I'm not using
it much any more but it did work with no problems.
Ron
I did use a piece of white translucent plastic between the lights and the
negative.
www.ronbakerphotography.com
----- Original Message -----
From: "J. Wayde Allen" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, June 14, 2001 4:17 PM
Subject: Re: [Cameramakers] Speed Graphic Enlarger
> On Thu, 14 Jun 2001, Robert Stoddard wrote:
>
> > Here's another idea: I have been intrigued by the possibilities of
using
> > what are called compact fluorescent bulbs to form a light head. These
lamps
> > are designed to replace an ordinary screw-base household bulb and
provide
> > fluorescent advantages (low power consumption and heating with high
light
> > output and long life) in ordinary household lamps. I see no reason why
they
> > couldn't be used to make a good diffused cold-light enlarger light head,
> > unless the spectral output of the bulbs is a problem. RKS
>
> Well I guess I need to throw my ideas into the pile. I've thought it
> would be nice to use a fiber optic illumination plate
> <http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=1443> as the
> enlarger light source. That way you can move the lamp and filter assembly
> out of the enlarger head
> <http://www.edmundoptics.com/IOD/Browse.cfm?catid=243&FromCatID=34>.
>
> That should minimize the enlarger head's weight and vibration. It also
> means that you could put a great deal of control into the desk mounted
> illumination source. For instance, with precision control of the source
> intensity would mean that you could eliminate the need to have aperature
> control on your enlarging lens.
>
> I think the Salt-Hill enlargers were actually designed this way, but don't
> know that for certain.
>
> Another possibility would be to make use of something like a high
> resolution LCD plate that could be used in place of the negative
> holder. You'd then be able to use this thing for making digital
> enlargements. Of course the problem here would be the pixel pattern that
> would probably occur due to the enlargement of the imaging
> plate. Probably the best direction from here would be to resort to a
> scanning laser system ...
>
> Just some random thoughts.
>
> - Wayde
> ([EMAIL PROTECTED])
>
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