Specifications

96 AUTOSTAR CCD PHOTOMETRY
Joins in the cardboard material have not given any problem in the
flat field images. The box is just large enough in width to
accommodate the 13.25 inch (33.65 cm) outside diameter front cell
of the LX200 telescope corrector lens. The inside length is
approximately the same as the width (a cube). Three small spring
wire feet slide into the cell to hold the light box in place when
taking flat field exposures. The telescope is pointed straight
upward with the light box attached during flat field imaging,
typically conducted at the conclusion of each night’s imaging
session.
A 1/4 inch (6.5 mm) thick plywood bulkhead is installed slightly
inside the open end of the white-painted box, which rests upon the
end of the telescope corrector cell when in use. (Fig. H-2.) The
plywood bulkhead is secured in place with self-tapping screws
through the sides of the box. A 12 inch (30.5 cm) diameter hole in
the bulkhead lets the light into the telescope aperture. On the inside
of the bulkhead, white paper covers the hole, serving as a light
diffuser.
Figure H-2. Outside of Plywood Bulkhead with Aperture.
(This Side Goes Against the Corrector Cell).