Celestron Tripod for StarSense Explorer Tabletop Dobsonian Telescopes StarSens - Page 16
Transporting
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For the 10" Dobsonian, you won't need any tools to tilt the primary mirror. Instead, simply adjust the thumbscrews. Three of the thumbscrews are locking screws, while the other three thumbscrews adjust the tilt. a. Start by loosening all three of the locking thumbscrews (Figure 21). LOCKING THUMBSCREWS TRANSPORTING Transporting the StarSense Explorer Dobsonian is easy, especially considering its size. First, remove the telescope tube from the base by loosening the altitude tensioning knob and lifting the telescope tube. You can carry the tube and the base separately by their integrated carry handles. The handles are positioned to balance the load, so neither component should be awkward to carry. Figure 21: For the 10" Dob, there are three spring-loaded collimation thumbscrews that adjust the tilt of the primary mirror. The other three thumbscrews lock the mirror in place once tilt adjustments are completed. b. Adjust the collimation thumbscrews one at a time. Each collimation thumbscrew is spring-loaded, so you can rotate it clockwise or counterclockwise. c. Continue adjusting the screws until the reflection of the secondary mirror is centered within the reflection of the primary mirror. d. Re-tighten the three locking thumbscrews until snug. e. When you are finished, the view through the collimation cap should look like Figure 16. Your telescope's optics are now aligned and ready for use. You can also confirm a telescope's alignment at night by pointing the telescope at a bright star at high magnification. Center the star in the field of view and slightly defocus the star-it should appear like a circle with a hole in the middle. (The "hole" is the shadow from the secondary mirror.) If the hole is not centered within the circle, you'll need to make additional adjustments to collimation (Figure 22). GOOD COLLIMATION NEEDS ADJUSTMENT Figure 22: You can check collimation by defocusing a bright star centered in the field of view and checking to see if the "hole" is centered. If it is not centered, some adjustment is needed. 16 I ENGLISH
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