5
Warning
Sunlight magnified through the NGT can cause instantaneous and permanent blindness, severe burns, and even fire.
Keep the dust cover in place and the aperture stop closed when the NGT is not in use.
Collimation
Each NGT is collimated before shipment and should require only minor adjustment from time-to-time. See
page 16
for further information on collimation.
Optional Accessories
The following accessories extend the capabilities of your NGT-12.5. They can be ordered at any time, and you will
find them easy to install.
Nose Assembly Light Baffle
A slide-on nose extension to prevent stray light from entering the focuser. It also helps slow the advance of dew
(recommended for dew plagued sites if no dew removal device is present).
Telrad Adapter Plate
A mounting adapter for a Telrad reflex finder.
Truss Rod Sliding Counterweights
Available in sets of three, these weights slide along the Serrurier truss rods to counter the weight of cameras or
additional equipment. One set is included as standard equipment.
Truss Rod Light Shroud
A lightweight, dew resistant, black fabric sleeve to block stray light, dust and air currents.
4" Aperture Stop Added to the Mirror Dust Cover
An aperture stop in the primary mirror dust cover to reduce glare when viewing planets or the moon.
CCD Counterweight
A center counterweight attaching between the normal mirror counterweights to counter the weight of a CCD camera
or other heavy equipment.
EZAlign Polar Alignment Scope
After a one-time alignment, this unit simplifies the process of aligning on the celestial pole. The constellation reticle
works in both the northern and southern hemispheres.
NGC-microMAX Computer with 245 Object Database
A small, lightweight unit with an eight-character red LED display that provides a real-time display of the telescope's
right ascension and Declination. A guide feature assists the user in locating any of the 245 objects in its database,
including 90 stars, the entire Messier catalog and 28 user-definable objects.
NGC-miniMAX Computer with 3900+ Object Database (Standard Equipment)
This unit is slightly larger than the NGC-microMAX, with a database which adds the brighter NGC and IC objects, the
Sun and planets. Though not necessary to its operation, a polar align feature greatly eases the task of polar aligning
the telescope. This unit is standard equipment unless ordered with one of the other optional computer units.
NGC-MAX Computer with 12000+ Object Database
This is our top-of-the-line in dedicated setting circle computers.
In addition to those objects found in the NGC-
miniMAX database, the NGC-MAX database contains nearly a thousand stars, the entire NGC catalog, and most of
the IC catalog. An identification feature will search the internal database for the object nearest the telescope's current
pointing position, assisting with identification of unfamiliar objects or suggesting possible ne w targets. A serial port
allows a personal computer to obtain information about the telescope's current position—useful for applications such
as Software Bisque's T
HE
S
KY
.
Summary of Contents for NGT-12.5
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