Finder scope bracket
8x50 Finder scope
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finder scope |
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| Tube rings | |
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Secondary |
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mirror “spider” |
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Primary mirror cell
Focuser
Focus lock thumbscrew
DETAIL
Figure 1. The 8" f/4.0 Newtonian Astrograph
Congratulations on your purchase of an Orion® 8" f/4.0 Newtonian Astrograph. It features fast, high- quality parabolic optics; a machined,
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,
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