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How to collimate the R200SS First loosen all the three collimation “push” screws and tighten the other three collimation “pull” screws on the primary mirror cell completely to “reset” the primary mirror to a position where the primary mirror is placed closely to the mirror cell.
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5. Using a Sight tube or Cheshire eyepiece and attach it to the visual back of the focuser to look at the secondary mirror surface through the pin hole. You can see the dot on the secondary mirror shown in the Figure 3. Check if the dot moves up and down in the field of view of the pin hole when you move the secondary mirror holder to the left and right-hand direction a little.
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the dot is seen above of the line, it means that the secondary mirror comes near the upper side shown in the Figure 5. In this case loosen the collimation screw “C” and tighten the screw “B” on the spider shown in the Figure 4. If the dot is seen below of the line, loosen the collimation screw “B”...
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12. Finally a star test. Take the telescope outside and let the optics fully cool to the ambient temperature.