Brackett Dissolver Stereo Projector
Model XB (Extra Bright)
AS NEW - Previously owned/never used  

Conceived in the mid-1980s by retired Polaroid engineer, Bob Brackett,
and first produced in 1988, a total of only 89 projectors were sold before
production ceased.

The dissolving projector is actually two stereo slide projectors, designed
with a dissolve function that smoothly transitions from one slide to the
next, (fade out - fade in) making stereo slide shows much more enjoyable. 

The dissolve transition is a professional projection technique that blends 

one image into the next image while reducing audience eye fatigue.

Refined from four previous generations of Dissolvers. The Dissolver XB
utlilizes the same illumination system (82volt) EXW lamps used in Kodak
Ektagraphic projectors with new "bright lamp" modules, making this the
brightest Dissolver ever made. This will produce a 113% increase in
brightness over the previous ELH illumination based Fader and Dissolver
systems.

A new "optic cage" design, contains condenser lenses, hot mirrors in place
of older heat absorbers, and polarizers. This design utilizes the entire
rectangular condenser lens surface to eliminate corner vignetting with the
widest aperture RBT or equivalent 33mm wide stereomounts.

Boroflote hot-mirrors reflect harmful infrared radiation, allowing only visible
light frequencies to pass to the emulsion. Production measurements indicate
only 5% visible light loss, compared to more than 33% with traditional heat
absorbers. Ample fan cooling provides a cool temperature range at the film
plane.

Refinements to the focus system provide the smoothest, most precise adjustment,
by direct gear drive to the lens rack, through concentric shafts. Dissolver XB
slide registration has been refined and optimized for precision plastic, metal or
cardboard stereomounts. Lower cost non-precision cardboard heat-seal and slip-in
mounts can also be used. All types of mounts are accurately held against the carrier
plate for a common reference plane, providing higher accuracy and repeatability, from
slide to slide.

4in x 6in angled slide tray holders on the top of the Dissolver are sized for commonly
found 4in x 5in plastic picture frames, optimum for holding 41 x 101 format stereomounts.
Optics: Four matched, turned-down (to fit interlens mount distance) modified Kodak
f3.5 / 75mm-120mm zooms.

Heat absorbers and condenser lenses remove the heat and direct the light through
precisely oriented polarizing filters. The cooled polarized light beam passes through
the slide and into the projection lens where an image is focused into the screen.
Two fans run continuously to cool the slide, optics, and lamps. Dissolves are accomplished
by fading out one pair of lamps, projecting the first slide, while simultaneously fading on
the other pair of lamps, projecting the second slide. The dissolve is performed by rotating
the dissolve lever located at the top of the projector.

You can dissolve from one slide to the other. This is done manually, which gives you total
artistic control over the end result. The projector was made by the legendary Bob Brackett,
using a custom-constructed metal case to hold standard Kodak parts, like lenses,
condensers, heat filters and halogen bulbs.This projector has long been considered the top
of the line stereo projector used in all NSA and PSA conventions.

The Brackett Dissolve accepts standard Realist format slides (4" x 1 5/8", 41x101mm) up to
seven sprocket size mounted in glass, plastic or cardboard.The Brackett Dissolver is manually
operated and gives the operator total artistic control over dissolve rate and other projection
techniques.

With only 89 possibly available in the world, needless to stress the exigent opportunity.