User manual CELESTRON ULTIMA 11 Instruction Manual

[. . . ] THE CELESTRON ULTIMA 91/4 AND ULTIMA 11 INSTRUCTION MANUAL Table of Contents INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 THE SCHMIDT-CASSEGRAIN OPTICAL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ASSEMBLING YOUR ULTIMA 91/4 AND 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Once you have eliminated all the drift, move to the star near the eastern horizon. The star should be 20 degrees above the horizon and within five degrees of the celestial equator. · · If the star drifts south, the polar axis is too low. If the star drifts north, the polar axis is too high. Again, make the appropriate adjustments to the polar axis to eliminate any drift. Unfortunately, the latter adjustments interact with the prior adjustments ever so slightly. So, repeat the process again to improve the accuracy checking both axes for minimal drift. Once the drift has been eliminated, the telescope is very accurately aligned. You can now do prime focus deep-sky astrophotography for long periods. NOTE: If the eastern horizon is blocked, you may choose a star near the western horizon, but you must reverse the polar high/low error directions. Also, if using this method in the southern hemisphere, the direction of drift is reversed for both R. A. and DEC. Aligning the RA Setting Circle In order to align the R. A. Second, you need to know the names of a few of the brightest stars in the sky. If you don't, they can be learned by using the Celestron Sky Maps (#93722) or consulting a current astronomy magazine. The farther you are from the celestial pole, the better your reading of the R. A. The star you choose to align the setting circle should be a bright one whose coordinates are known and easy to look up. setting circle, see the list at the back of this manual. ) Center the star in the finder. You can consult a star catalog or use the list at the end of this manual. setting circle has a marker every six minutes with each hour labeled. 2. As long as the drive is operating, the circle does not need to be reset once indexed to the correct coordinate (i. e. , once aligned). Once you have finished this process you are ready to use the setting circles to locate objects in the night sky. See the section on "Using the Setting Circles, " for specific information. Ultima 91/4 and Ultima 11 Manual 37 USING THE DRIVE The Ultima drive is a state-of-the-art motor drive system designed specifically for the Ultima telescopes. The clock drive is powered by a 9-volt rectangular battery which can run the telescope for up to 35 hours. [. . . ] The barlow is removable so you can attach your camera to your Fastar and shoot at prime focus or 2x prime focus. T-C Adapter (#93636) - This adapter allows you to couple a video or movie camera to a telescope. The camera must have a removable lens with a standard "C" thread. T-Ring - The T-Ring couples your camera body to the T-Adapter, Radial Guider Body, or Tele-Extender. [. . . ]