The Importance of Collimation – Part 3

Collimation4

Primary Mirror Not Aligned ( click For Larger Picture )

Now the primary mirror can be adjusted. As mentioned in the last post, the laser beam goes from the primary mirror, then to the secondary mirror and back into the collimator.

The picture to the left shows the laser beam in my telescope at the 5 o’clock position in relation to the center of the target. This means that my primary mirror is not aligned and images through the scope will not be perfect.

Again, as each telescope is different refer to your manual on how to make adjustments to the primary mirror which is the large mirror in the back of the telescope.

Primary Mirror Aligned ( Click for Larger Image)

Primary Mirror Aligned ( Click for Larger Image)

By adjusting the screws of the primary mirror, you will see the red dot on the target move towards or away from the center of the target.

Adjust the primary mirror until the red dot is lined up perfectly with the center of the target.

In the picture on the left I have the red dot slightly above the centre target for illustration purposes. For perfect alignment the red dot must be in dead center.

At this stage check to make sure that both primary and secondary mirrors are now both aligned. If so, your telescope is perfectly collimated.

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~ by sydneystargazers on October 10, 2009.

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