32 Elkay Dr., Chester, New York 10918 Ph. (845) 469 - 4551 www.televue.com
Tele Vue
V i s i o n a r y
Starbeam
advanced telescope pointer
TM
Introduction:
Starbeam is a precision unit power finder designed to make pointing your astronomical telescope easy. Viewing through Starbeam, a
transparent "red-star" appears projected against the sky background. The "star" is actually a small pinhole illuminated by a red L.E.D. Placed
at the focus of a beam-splitting mirror/lens, the star is projected to infinity. Starbeam is effectively a reverse Herschelian telescope.
The size of the pinhole and focal length of the mirror result in a 0.4° red-star, about the diameter of the moon. Its size, color, and adjustable
brightness and blink rate make it easy to see against any twilight to dark sky background. With a mirror aperture of 39mm, the projected
image can be easily seen at any distance behind the mirror, whether 2 inches or 2 feet! Because the mirror surface is uncoated, and a
multi-coated compensating curve is designed into the back of the mirror, the normal sky background appears through the almost invisible
"mirror-lens."
There are three mounting bases available for Starbeam, one for Tele Vue scopes, one for Newtonian/Dobsonians with a 4" or larger tube
diameter, and one for SCTs 8" or larger. Adjustment screws and lock screw make Starbeam
TM
easy to align to your telescope.
Installation:
For Tele Vue Telescopes (SFT-2003)
1)
Removing Starbeam from Base Channel
- First, back out the
Horizontal Adjustment Screws
until they clear the
Optical
Assembly Support Bar
. While holding Starbeam, remove the
Lock Screw
and lift Starbeam from the
Base Channel
.
2)
Installing Base Channel
- Drop the button head screw through the clearance hole in the
Base Channel
. Using the Allen key (provided),
lock the
Base Channel
(with the
Horizontal Adjustment Screws
oriented towards the front of the telescope) into the preferred mating
channel of the telescope mount ring. If the screw bottoms out before the
Base Channel
is locked down, use the supplied lock-washer as a
spacer by putting it under the screw head.
3)
Installing Starbeam
- Position Starbeam so the holes in the sides of the
Optical Assembly Support Bar
align with the horizontal
adjustment screws. Tighten the
Horizontal Adjustment Screws
until the tips enter the holes in the
Optical Assembly Support Bar
. You
can now lock the Starbeam down gently with the
Vertical Lock Screw
.
For Open Tube Telescopes (SFU-2004)
To attach Starbeam to any open telescope tube over 4" diameter, simply drill matching holes in your tube and use the supplied machine
screws and nuts to fasten the
Base Channel
to your telescope tube. Follow the instructions above for mounting Starbeam in its
Base Channel
.
For Schmidt Cassegrain Telescopes (SFC-2009)
The Starbeam model for 8" or larger diameter SCTs installs on the rear cell of the telescope. First, mount the
Attachment Bracket
to the telescope's rear cell. The screw slots in the
Attachment Bracket
are sized and spaced to accommodate the wide variety of accessory
attachment points on popular SCTs. However, due to the different screw sizes and lengths, attachment screws are not provided with the
Starbeam. Slide the
Dove Tail
into the
Attachment Bracket
until it hits the
Screw Stop
. Tighten the thumb screw on the side of the
Attachment Bracket
.
Tele Vue Base
SCT Base
Base Channel
Base Channel
Button Head Attachment screw
Attachment Slots
Stop Screw
SCT Attachment
Bracket
Universal Open Tube Base
Base Channel
Machine Screws
Nuts
Dovetail
