Orion 8958, 8956 instruction manual Parts List, Unpacking Your Telescope, Setting Up Your Telescope

Optical tube

Collimating eyepiece Extension rings

Figure 1: The Ritchey-Chrétien Optical Tube (6" shown)

Congratulations on your purchase of an Orion Ritchey-Chrétien astrograph! Astroimaging demands high contrast and center to edge image sharpness. The Ritchey-Chrétien optical sys- tem features precision hyperbolic mirrors with an impressive reflectivity rating of no less than 94%. These highly corrected optics offer virtually coma- free performance; and multiple knife-edge baffles provide images with superb contrast. These design features will offer a lifetime of outstanding perfor- mance for imaging and visual applications. The Ritchey-Chrétien is a member of the Cassegrain family of telescopes. This unique design offers large-diameter optics while maintaining very short tube lengths, making them extremely portable and versatile.

Parts List

1Optical tube assembly

12" Extension ring

21" Extension rings

1 Collimation eyepiece

Unpacking Your Telescope

Use care when unpacking the shipping carton. We recom- mend keeping the boxes and all original packaging materi- als. In the event that the telescope needs to be shipped to another location, or returned for warranty repair, having the proper packaging will ensure that your telescope will survive the journey intact. Returns for refund or exchange will not be accepted without all of the original packaging.

Your new telescope arrives double-boxed (Figures 2a-d). Make certain you are opening from the top of the box to access the accessories packaged in the Styrofoam shell. To access the optical tube simply grasp the Styrofoam piece and lift it out of the box and set it aside for the time being. Once all items have been removed from the box take a moment to confirm that all pieces are present and intact. Refer to the Parts List to aid in identifying the various pieces.

Setting Up Your Telescope

Your Ritchey-Chrétien optical tube comes ready to use right out of the box. The focuser is attached to the optical tube and ready to accept either visual or photographic accessories. Also included are three individual extension rings (Figure 1). These extension rings are provided to allow multiple visual or photographic accessories to reach focus. These are designed

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