Celestron Advanced VX 700 Maksutov Cassegrain Telescope Advanced VX - Page 26

larger the number), the lower the eyepiece magnification. The shorter the focal length (i.e., the smaller the number), the higher the magnification. Generally, you will use lowto-moderate power when viewing. For more information on how to determine power, see the section on "Calculating Magnification." Installing the 6x30 Finderscope The 5", 6", 8" and 9.25" Schmidt Cassegrain telescopes come with 6x30 finderscopes used to help you locate and center objects in the main field of your telescope. To accomplish this, the finder has a built-in cross-hair reticle that shows the optical center of the finderscope. To install the finderscope: 1. A ttach the bracket to the optical tube. To do this, place the curved portion of the bracket with the slot over the two holes in the rear cell. The bracket should be oriented so that the rings that hold the finder are over the telescope tube, not the rear cell. Start threading the screws in by hand and tighten fully with a screwdriver. Finderscope Nylon Adjustment Screw Finder Bracket Rear Cell 2. P artially thread-in the three nylon thumbscrews that hold the finder in place inside the bracket. Tighten the screws until the nylon heads are flush with the inner diameter of the bracket ring. Do NOT thread them in completely, or they will interfere with the placement of the finder. (Having the screws in place when the finder is installed will be easier than trying to insert the screws after the finder has been installed). 3. Slide the rubber O-ring over the back of the finder (it will NOT fit over the objective end of the finder). It may need to be stretched a little. Once on the main body of the finder, slide it up about one inch from the end of the finder. 4. R otate the finder until one cross hair is parallel to the R.A. axis and the other is parallel to the DEC axis. 5. S lide the eyepiece end of the finder into the front of the bracket. 6. S lightly tighten the three nylon thumb screws on the front ring of the bracket to hold the finder in place. 7. O nce on, push the finder back until the O-ring is snug inside the back ring of the finder bracket. 8. Hand tighten the three nylon tipped thumb screws until snug. Installing the 9x50 Finderscope The 8" EdgeHD and the 11" Schmidt-Cassegrain telescopes come with 9x50 finderscopes used to help you locate and center objects in the main field of your telescope. To accomplish this, the finder has a built-in cross-hair reticle that shows the optical center of the finderscope. The finderscope must first be mounted in the included quick-release bracket then attached to the rear cell of the telescope. To install the finderscope: 1. Locate the finderscope mounting bracket attached to the bottom portion of the finder bracket. Loosen the two thumb screws to slide the mounting bracket from the finderscope bracket. 2. Find the two holes in the rear cell of the telescope on the top left, when looking from the back of the tube. 3. Place the mounting bracket over the two holes of the rear cell on the optical tube. 4. Insert the screws through the bracket and into the rear cell. WARNING: If you remove the mounting bracket, do not completely thread the screws back into the rear cell of the telescope. The screws may be long enough to obstruct the movement of, and possibly damage, the primary mirror. With the bracket firmly attached to the telescope, you are ready to attach the finder to the bracket. 1. Slide the O-Ring over the back of the finderscope and position it on the tube toward the objective end of the finderscope. 2. Slide the eyepiece end of the finderscope into the front ring of the bracket (the front ring is the one without the adjustment screws), then through the back ring. It may be necessary to push down the spring loaded pivot screw so that the finder will pass through the back ring. 3. Push the finder back until the O-Ring is snug inside the front ring of the finder bracket. 4. Hand tighten the two alignment thumb screws until they make contact with the finderscope. Pivot Screws Alignment Screws Quick Release Screws 26 I ENGLISH