User manual CELESTRON ONYX80EDF

[. . . ] Congratulations on your purchase of the Celestron Onxy 80EDF telescope!Whether your interest lies in nature or celestial viewing the Onyx 80EDF telescopes offers the finest optical quality guaranteed to give you years of viewing pleasure. Onyx 80EDF Focuser Rotation Locking Screw Sight Scope Extendable Lens Shade 2" Focuser (with 1. 25" Adapter) Focuser Knobs Phototripod / Telescope Mounting Bracket Photographic Tripod For best results, attach your Celestron telescope to a heavy duty photo tripod or equatorial mount. To attach to a standard photo tripod: Align the hole at the bottom of the tripod mounting bracket with the ¼"x20 mounting screw on top of any standard photo tripod. Thread the mounting screw into the tripod mounting bracket to secure the scope in place. Equatorial Mount Your Onyx 80EDF's mounting bracket can be used with the Advanced GT CG-5 equatorial mount. [. . . ] They include star clusters, planetary nebulae, diffuse nebulae, double stars, and other galaxies outside our own Milky Way. Unless your telescope is mounted onto a computerized mount, you will need to know where to look in the sky for these objects. The Celestron Sky Maps (#93722) will help you locate the brightest deep sky objects. Once you start observing deep sky objects, there are a few things to remember. First, most deep sky objects have a large angular size. Therefore, low to moderate power is all you need to see them. Second, visually they are too faint to reveal any color that is common to photographs. Instead, they have a black and white appearance. And lastly, because of their low surface brightness, they should be observed from a dark sky location. Light pollution around large urban areas washes out most nebulae making them difficult, if not impossible, to see. An LPR (Light Pollution Reduction) Filter (#94126A) is available for use with 1 1/4" eyepieces to allow urban use of the 80EDF for looking at nebulae. Photographing the Moon After looking at the night sky for awhile you may want to try photographing it. If you do, start with a nice, bright object like the Moon. Attach your telescope to a stable platform like the Celestron Alt-Az Tripod (#93607). Load your camera with film that has a moderate-to-fast speed (i. e. , high ISO rating). Faster films are more desirable when the Moon is a crescent. When the Moon is full, and at its brightest, slower films are more desirable. If photographing during the full phase, use a yellow filter to reduce the light intensity and to increase contrast. Center the Moon in the field of your telescope. Set the shutter speed to the appropriate setting (see below). Trip the shutter using a cable release so as not to shake the camera and telescope. Lunar Phase Crescent Quarter Full ISO 50 1/8 1/30 1/125 ISO 100 1/15 1/125 1/500 ISO 200 1/60 1/250 1/1000 ISO 400 1/125 1/500 1/2000 3. 5. The exposure times listed here should be used as a starting point. [. . . ] Celestron warrants this telescope to be free from defects in materials and workmanship for two years. Celestron will repair or replace such product or part thereof which, upon inspection by Celestron, is found to be defective in materials or workmanship. As a condition to the obligation of Celestron to repair or replace such product, the product must be returned to Celestron together with proof-of-purchase satisfactory to Celestron. The Proper Return Authorization Number must be obtained from Celestron in advance of return. [. . . ]