Orion 9827 manuale d’uso

INSTRUCTION MANUAL IN 160 Rev . B 02/09 Providing Exceptional Consumer Optical Products Since 1975 Customer Support (800)-676-1343 E-mail: support@telescope.com Corporate Offices (831)-763-7000 89 Hangar W ay , W atsonville, CA 95076 Orion ® Astr oV iew ™ 6 EQ #9827 Equatorial Reflecting T elescope[...]

2 Figure 1. The AstroView 6 EQ Declination slow motion control Declination lock lev er Counterweight shaft Large counterweight Small counterweight “T oe Sav er” Counterweight lock knobs T ripod leg Accessor y tra y brack et Accessor y tra y Finder scope Finder scope brack et Eyepiece F ocus knob T ube r ings Optical tube Right ascension slow- m[...]

3 T able of Contents 1. Parts List ............................. 3 2. Assembly ............................ 3 3. Using Y our T elescope ................... 5 4. Setting Up and Using the Equator ial Mount . . 7 5. Collimation (Aligning the Mirrors) ......... 11 6. Astronomical Obser ving ................ 13 7. Astrophotograph y .....................[...]

4 5 . Next, tighten the wingnuts at the top of the tr ipod legs, so the legs are securely fastened to the equatorial mount. Use the larger wrench and your fingers to do this . 6 . Orient the equator ial mount as it appears in Figure 1, at a latitude of about 40°, i.e., so the pointer ne xt to the lati - tude scale is pointing to the line at “40?[...]

5 top of the foc user . Lock the brack et into position by tightening the knurled thumbscrew on the do vetail slot. Inserting the Eyepiece Loosen the thumbscrews on the ey epiece holder and remove the small dust cap. Then inser t the 25mm ey epiece into the f ocuser and secure it with the thumbscrews. Y our telescope is now completely assembled and[...]

6 Aligning the Finder Scope The AstroView 6 EQ comes with a 6x30 achromatic finder scope (Figure 2a). The number 6 means six-times magnifica- tion and the 30 indicates a 30mm diameter front lens. The finder scope makes it easier to locate the subject you want to obser ve in the telescope, because the finder scope has a much wider field-of-vie w . T[...]

7 the f ocuser. Then carefully lift the eyepiece out of the holder . Do not tug or pull the ey epiece to the side, as this will knock the telescope off its target. Replace the eyepiece with the ne w one by sliding it gently into the holder . Re-tighten the thumb - screws , and focus f or your ne w magnification. 4. Setting Up and Using the Equatori[...]

your latitude is 35° Nor th, set the pointer to +35. The latitude setting should not ha ve to be adjusted again unless you mov e to a diff erent viewing location some distance aw ay . 3. Loosen the Dec. lock lev er and rotate the telescope optical tube until it is parallel with the R.A. axis. The pointer on the Dec. setting circle should read 90°[...]

9 4 . Loosen the R.A. lock le ver and rotate the mount about the R.A. axis until the March 1 indicating mark (the long line between the “2” and the “3”) on the date circle lines up with the 4 PM mark (the long line above the “16”) on the R.A. setting circle. Y ou may find it conv enient to remov e both the counter- weights and the teles[...]

10 Remember , accurate polar alignment is not needed f or casual visual obser ving. Most of the time, appro ximate polar align - ment, as outlined pre viously , will suffice. T racking Celestial Objects When you obser ve a celestial object through the telescope, you’ll see it dr ift slowly across the field of view . T o keep it in the field, if y[...]

11 scope on the R.A. axis until the counterweight shaft is hor i - zontal (parallel to the ground). Then loosen the Dec. lock le ver and rotate the telescope until it is pointing straight overhead. The counterweight shaft is still hor izontal. Then retighten both lock le vers . What if you need to aim the telescope directly nor th, but at an object[...]

12 mirror holder stationary (be careful not to touch the surf ace of the mirror), while turning the center scre w with a Phillips head screwdriv er (See Figure 11). T urning the screw clockwise will mov e the secondar y mirror tow ard the front opening of the optical tube, while tur ning the screw counter-clockwise will mov e the secondar y mirror [...]

13 T o star t, tur n the smaller thumbscrews that lock the pr imar y mirror in place a fe w tur ns each (Figure 13). Use a screw - driver in the slots, if necessary . Now , tr y tightening or loosening one of the larger collimation thumbscrews with your fingers (Figure 14). Look into the fo - cuser and see if the secondar y mirror reflection has mo[...]

14 Seeing and T ransparency Atmospheric conditions play a huge par t in quality of viewing. In conditions of good “seeing”, star twinkling is minimal and objects appear steady in the ey epiece. Seeing is best over - head, worst at the hor izon. Also, seeing generally gets bet - ter after midnight, when much of the heat absorbed by the Ear th du[...]

15 dreds of deep sky objects. Do not e xpect to see as much color as you in NASA photos, since those are tak en with long-e xpo- sure cameras and hav e “false color” added. Our eyes are not sensitive enough to see color in deep-sky objects except in a f ew of the brightest ones. Remember that you are seeing these objects using your own telescop[...]

16 Determine in which constellation the object lies. Now , find the constellation in the sky . If you do not recognize the constella- tions on sight, consult a planisphere. The planisphere gives an all-sky view and shows which constellations are visible on a given night at a giv en time. Now , look at your star char t and find the br ightest star i[...]

17 T ur n the motor drive on. Adjust the telescope’ s focuser so that the image appears shar p in the camera’ s viewfinder . The camera’ s shutter is now ready to be opened. A remote shut - ter release must be used or the image will be blurred beyond recognition. T ry exposure times between 1 and 10 seconds, depending upon the brightness of t[...]

18 rors, the better . Small specks of dust or flecks of paint have vir tually no effect on the visual perf or mance of the telescope. The large pr imar y mirror and the elliptical secondary mirror of your telescope are front-surface aluminized and over-coated with hard silicon dio xide, which pre vents the aluminum from o xidizing. These coatings n[...]