Chromega D Mixing Chamber has shattered glass

[Chris Torkzadeh]

On the mixing chamber in my Chromega D Dichroic II, the coin-sized
glass through which light enters the chamber is shattered. The glass
is still hanging in there, broken into three pieces. Also a white
sheet immediately behind the glass has burnt through.

I have been using the chamber like this for years! (I am not known to
be very picky about my printing.) However, I am wondering if I would
see any difference in my prints if I bought a new chamber or had this
one fixed. (I print primarily B&W)

If so, which option would you pick? How much money we're talking
about?

Thanks in advance,

Chris Torkzadeh

[David L. Glos]

That little coin sized piece of glass is IR heat absorbing glass.........which
is why you now have a burnt spot in styrofoam mixing chamber reflecting
surface. Take the box appart, and replace that reflecting surface. There is
nothing magical about the grade of styro used.....just get a piece of box
lining, or hardware store material, and cut to fit. As long as it is the snow
white color, you should be fine. Of course, if you print color, your
filtration packs will change. Chech with Mike Sparks, of Focal Point
Industries, for the IR glass. He has a nice web site, although, I don't have
the address stored. Should be easy enough to find with a simple search.

If you don't replace that glass, you will simply burn a hole in your new piece
of styrofoam.

David Glos

Univ. of Cincinnati
513.558.6930

glo...@email.uc.edu

[Mike Sparks]

Chris,

It sounds like your mixing chamber could use a re-build. If the IR
filter (the coin sized glass) is broken and the white diffusion sheet is
burnt you're causing a couple problems. The foam liner to the mixing
chamber is probably yellowed. Also, the thin diffuser helps to even out
the light so you probably have some unevenness of light. Although if you
print primarily 35mm this probabaly hasn't caused a problem.

To fix your box.

1. Go to Home Depot and pick up some 1/2 inch styrofoam. Replace the
foam liner.
2. Remove the bottom diffuser. Using some Scotchbrite material buff
both sides in a circular pattern. This will remove any scratches or
surface yellowing.
3. Get a new IR filter. Our price is $22.50. Check around for pricing
but I think that is about as low as you'll find.
4. The thin diffuser material is the type that's also used in front of
lighting equipment to
soften the light. Your local camera store may have sheets of this
material.

Once everything is put back together you'll have a brand new operating
light box.

mike sparks
focal point

Chris Torkzadeh wrote:

> On the mixing chamber in my Chromega D Dichroic II, the coin-sized
> glass through which light enters the chamber is shattered. The glass
> is still hanging in there, broken into three pieces. Also a white
> sheet immediately behind the glass has burnt through.
>
> I have been using the chamber like this for years! (I am not known to
> be very picky about my printing.) However, I am wondering if I would
> see any difference in my prints if I bought a new chamber or had this
> one fixed. (I print primarily B&W)
>
> If so, which option would you pick? How much money we're talking
> about?
>
> Thanks in advance,
>
> Chris Torkzadeh

--
************************
Mike Sparks
Focal Point Ind. Inc.
2867 Stonewall Pl. #101
Sanford, FL. 32773
407-322-2123 fax 322-2186
mi...@fpointinc.com
***********************