RE: [Largeformat] Converting a camera to an enlarger

["Frank Filippone" <red735i@earthlink.net>]

From: "Frank Filippone" <red735i@earthlink.net>

> >However, I have two major problems to solve:
> >
> >1. Heat. Especially with the reflector, the glass and the negative
> >    get very hot with time.
> >2. Uniformity of illumination. All types of bulbs I've tried so far
> >    give a quite distinct fall-off towards the edges.

You would have to build a light/mixing
> chamber.
> Something that was coated/painted bright white. I was thinking of
> using thin
> sheets of Styrofoam to line the inside of the light chamber, as
> this would
> help to diffuse the light even further.


I don;t like the thought of the fan vibrations,  and the thought of
styrofoam melting makes me scared of a fire......

so my suggestion is to use THICK glass mirror material to line the chamber.
The thickness will act as a heat sink, and the reflector quality of the
mirror will help to even out hot spots.  Make the box out of plywood.
 Glue the mirror to the walls using silicone sealer for bathtubs, using the
plop technique.... a little plop here, a little plop there.  Opal glass is a
good final diffuser.

Frank Filippone