Orion NEWTONIAN ASTROGRAPH 9527 - Manual (Page 2)

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Congratulations on your purchase of an Orion ® 8"
f/4.0 Newtonian Astrograph. It features fast, high-
quality parabolic optics; a machined, dual-speed
Crayford focuser with linear-track bearing; and
excellent mechanical construction. This telescope
has been specially optimized for astrophotography
with DSLR and astronomical CCD imaging cam-
eras. These instructions will help you set up and
use your telescope.
Parts List
Optical Tube Assembly
Optical tube dust cover
1.25" eyepiece adapter
8x50 finder scope with bracket
Pair of hinged tube rings
35mm extension tube adapter
Collimation cap
Battery holder for cooling fan
Getting Started
Your 8" f/4.0 Newtonian Astrograph arrives nearly fully
assembled from the factory. The optics were collimated at the
factory, however you should check the collimation prior to first
use to make sure it held during shipment (see “Collimating
the Optics”). Not uncommonly, a minor adjustment may be
necessary.
We recommend keeping all of the original packaging. In the
unlikely event you should need to ship the telescope back to
Orion for warranty repair service, you should use the original
packaging to ensure the telescope stays intact during ship-
ping. Take a moment to inspect the telescope and all of its
parts.
Before proceeding with the instructions, refer to
Figure 1 to
familiarize yourself with some of the features and components
of the telescope.
Connecting the Telescope to a Mount
The 8" f/4.0 Newtonian Astrograph comes with a pair of
hinged, felt-lined tube rings to hold the optical tube assembly.
Each ring has a flat boss on opposite sides. One boss has a
single M6 metric threaded hole. The other has three holes;
the center hole has a ¼"-20 thread and the two flanking holes
Figure 1. The 8" f/4.0 Newtonian Astrograph
8x50 Finder
scope
2" Accessory
collar
1.25" Adapter
Dovetail
finder scope
base
Focus lock
thumbscrew
Focuser
Primary mirror cell
Tube rings
Fine focus
wheel
Focus
wheel
Focus wheel
DETAIL
DETAIL
Drawtube
tensioning
thumbscrew
Secondary
mirror “spider”
Finder scope
bracket