Related Manuals for Explore Scientific David H. Levy Comet Hunter
Summary of Contents for Explore Scientific David H. Levy Comet Hunter
- Page 1 Owner’s Guide ™ David H. Levy Comet Hunter 152mm f/4.8 Maksutov-Newtonian Telescope ™...
- Page 2 MOVING AND LIFTING Although the David H. Levy Comet Hunter Telescope is considered a lightweight instrument in its aperture class (about 15 pounds for just the telescope, and about 40 pounds with the telescope in its case), special care should be taken to make sure that you are not straining to lift or move it.
- Page 3 Through a special arrangement with Explore Scientific, sales of this Comet Hunter telescope help support the National Sharing the Sky Foundation so that we can carry on with our outreach activities. So we encourage you to use your Comet Hunter as often as possible and to get involved in public outreach in astronomy in your local community.
- Page 4 A Message from Explore Scientific We wish to thank you for choosing a David H. Levy Comet Hunter 152mm f/4.8 Maksutov-Newtonian telescope! It is quite literally a telescope that was born to share the sky; a portion of each sale goes to the National Sharing the Sky Foundation, a non-profit organization based in Arizona, where David Levy and his staff support schools and the general public around the world in their quest to learn more about science through hands on astronomy.
- Page 5 Fig. 1 Standard Equipment 1. Optical Tube 2. Cradle Rings with Handle 3. 8x50 Correct Image Finderscope 4. Finderscope Illuminator 5. 10:1 Two-Speed Focuser 6. Focus Lock Knob 7. Focus Tension Knob 8. 30mm 70° Series Eyepiece 9. 2’ to 1.25” Eyepiece Adapter 10.
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Page 6: Getting Started
Getting Started Focusing the Finder Scope Fig. 3, Objective Lens Focusing Fig. 2, Eyepiece Focusing The 8X50 Correct Image Finder Scope has focusing adjustments for the objective and the eyepiece. You can make the initial focus adjustments hand held: Loosen the eyepiece focus adjustment by turning it counterclockwise while firmly holding the eyepiece focus lock ring (1, Fig. - Page 7 Mounting and Adjusting the Finder Scope To align the finder scope, perform steps 1 through 5 during the daytime; perform step 6 at night. 1. Slide the track on the bottom of the finder scope into the slot in the finder scope mounting assembly (1, Fig.3). To secure the finder scope to the mounting assembly, tighten the two thumbscrews (2, Fig.
- Page 8 Using and Adjusting the Focuser The David H. Levy Comet Hunter 152mm f/4.8 Maksutov-Newtonian comes standard with a 10:1 Two-Speed Crayford-Style focuser, which allows for precise focusing.
- Page 9 Fig. 8 Fig. 9 Fig.10 Fig.11 Fig. 12 Fig. 13 Collimation The Comet Hunter telescope is optically aligned (collimated) at the factory prior to shipment, but may occasionally require re- alignment, particularly if the telescope has received rough handling in shipment. Before using this model for the first time, check the alignment of the optics as outlined in this section.
- Page 10 Secondary Mirror Adjustments: There are three types of major adjustment to the secondary mirror: rotation, vertical centering, and tilt. If the secondary mirror (1, Fig. 11) isn’t centered in the focuser drawtube (2, Fig. 11), please center it by using the adjustment screws (3 and 4 Fig. 8). to tilt the secondary mirror into place.
- Page 11 Cone error adjustment is most often used when the telescope is attached to a German equatorial mount, so that the polar axis of the mount and the center of the telescope’s optical axis are aiming at the same point in the sky. Adjustment is done by trial and error.
- Page 12 Explore Scientific offers a professional cleaning and collimation service if you wish, but it is helpful to know how to clean the optics yourself. In this instruction, we give you all of the cleaning agents that we use in regular optics production, how to prepare them, and how to use them.
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Page 13: Specifications
Specifications Optical design: Maksutov-Newtonian 152 mm (6“) Diameter (primary mirror): Diameter (secondary mirror): 46 mm Obstruction: 49 mm Focal length: 731 mm Focal ratio: f/4.8 Resolving power: 0.74 arc seconds Material (primary mirror): BK-7 Coatings: Enhanced Multi-Layer Deposition (EMD™) Coatings on Primary Mirror and Corrector Plate;... - Page 14 © 2009 Explore Scientific™ - BRESSER® A JOC Company 7401 Katelyn Ct. Suite A • San Diego, CA 92120 • USA Rev. 1.1 Tel. +1 (888) 599-7597 • Fax +1 (888) 877-7248 • www.explorescientific.com Part No. UG-CH102009...