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Фрагмент инструкции
A 07/11 2 Congratulations on your purchase of an Orion f/3.9 Newtonian Astrograph! These powerful imaging telescopes feature “fast,” high-quality parabolic optics, a 2" dual-speed Crayford focuser, and excellent mechanical construction with some special features. Optimized for astrophotography with DSLR and astronomical CCD imaging cameras, our f/3.9 Newtonian Astrographs are capable of delivering breathtaking imaging performance – for beginning to advanced astrophotographers. This instruction manual covers both the 8" and 10" models of f/3.9 Newtonian astrograph. Although they differ in aperture and focal length, physical size, and weight, they are otherwise very similar in mechanical construction and features. So we will use the 8" model to illustrate the features of both astrographs. Any exceptions related to the 10" model will be noted. This instruction manual will help you to set up and properly use your telescope. Please read it through completely before attempting to use the scope and its included accessories. Parts List • Optical tube assembly • Optical tube dust cap • 1.25" eyepiece holder • 9x50 finder scope with bracket • Pair of hinged tube rings • 2" thread-on extension adapter, 30mm • 2" slip-on extrension adapter, 36mm • Quick collimation cap • Cooling accelerator fan and battery holder (batteries not included) • Starry Night Special Edition CD-ROM and StarTheater DVD 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 2" Accessory collar Finder scope bracket 9x50 Finder Scope Optical tube Tube rings Focus wheel Fine focus wheel Drawtube tensioning thumbscrew Focus wheel Figure 1. The Orion 8" f/3.9 Newtonian Astrograph WARNING: Never look directly at the Sun through your telescope or its finder scope – even for an instant – without a professionally made solar filter that completely covers the front of the instrument, or permanent eye damage could result. Young children should use this telescope only with adult supervision. 3 packaging to ensure the telescope stays intact during shipping. 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. 1. Getting Started The telescope arrives nearly fully assembled from the factory, with optics installed, in a single shipping box. The optics were collimated at the factory, however you should check the collimation prior to first use (see “Collimating the Optics”), as it’s not uncommon for Newtonian optics to get bumped slightly out of collimation in the delivery process. Likely only a minor adjustment, if any, may be necessary. Attaching the Telescope to a Mount The f/3.9 Newtonian Astrographs each come with a pair of hinged, felt-lined tube rings to hold the optical tube assembly (OTA) on a mount. Each ring has a flat boss on opposing sides. Both bosses have a ."-20 threaded hole in the center. One tube ring has a piggyback camera adapter mounted on one of the bosses, which can be used to mount a camera for piggyback astrophotography. That adapter can be removed if you wish to attach an optional dovetail plate to the top of the tube rings for mounting a piggybacked guide scope. The tube rings should be attached to a dovetail mounting plate (sold separately) compatible with your mount’s equatorial head. Balancing the telescope is achieved by sliding the dovetail mounting plate forward or backward within the mount’s dovetail saddle. You can also move the telescope forward or backward within the tube rings. To do so, loosen the tube ring clamps slightly and slide the telescope tube forward or backward as needed to reach optimum balance, then retighten the clamps. Rotating the telescope to achieve a comfortable eyepiece or camera angle is done in the same fashion. Simply loosen the tube ring clamps just enough to allow the optical tube to rotate within the tube rings. Retighten the tube ring clamps securely once you have reached the desired eyepiece or camera orientation. 2" Dual-Speed Crayford Focuser The f/3.9 Newtonian Astrograph features an all-metal, 2" dual-speed (11:1) Crayford-type focuser (Figure 2), which allows very precise, fine focusing. A reinforcing plate inside the optical tube just under the focuser provides added rigidity, minimizing any “flexing” of the focuser housing on the tube due to the weight and moment arm of the imaging camera. If the drawtube slips under the weight of your imaging system or heavy visual accessories, simply increase the drawtube tension by gently tightening the drawtube tensioning thumbscrew as needed. The smooth focus motion and fine-focus wheel allow precision adjustments for critical focusing of eyepieces and cameras. Once focus is reached, you can lock the drawtube in place by tightening the drawtube tensioning thumbscrew. The focuser ...
Эта инструкция также подходит к моделям:Оптические приборы - #8297 8" F/3.9 (2.7 mb)