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” and tighten the screw “C”
oppositely.
8.
Confirm that the dot is seen at the center of the imaginary cross hairs in the field of
view. Remove the disc from the change-over ring.
9.
Rotate the secondary mirror holder so that each of distances “a” and “b” becomes
equal shown in the Figure 6. Now fix the secondary mirror holder tightly.
10.
Again you need to adjust the position of the secondary mirror precisely with the
collimation screws “B”, “C” and “A”. When you shift the secondary mirror upper or
lower, turn the screws “B” or “C” only and don’t use the screw “A”. When you shift
the secondary mirror forward, turn the screw “A”. Turning the screws “A” and “B”
evenly shifts the secondary mirror backward.
11.
Aligning the primary
mirror:
When looking into the drawtube without attaching
an eyepiece, you can see like the diagram blow if the optical axis is correct. If you
cannot see like the diagram, align the primary mirror with the collimation “push
and pull” screws on the primary mirror cell.
