Meade Mini 82 User Manual - Page 30

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Collimation

With the collimation performed, you will want to test the accuracy of the

alignment on a star. Use the 26mm eyepiece and point the telescope at a

moderately bright (second or third magnitude) star, then center the star image

in the telescope’s field-of-view. With the star centered follow the method

below:

• Bring the star image slowly out of focus until one or more rings are visible

around the central disc. If the collimation was performed correctly, the

central star disk and rings will be concentric circles, with a dark spot dead

center within the out-of-focus star disk (this is the shadow of the

secondary

mirror

), as shown in

Figure 10.

(An improperly aligned telescope will

reveal elongated circles

(fig. 8),

with an off-center dark shadow.)

•If the out-of-focus star disk appears elongated (

fig. 8

), you will need to

adjust the

primary mirror

adjusting tilt screws of the

primary mirror cell

(fig. 3, #3)

•To adjust the

primary mirror tilt screws

, first unscrew several turns the

3 slotted-head

primary mirror cell locking screws

(fig. 3, #2), to allow

free turning movement of the tilt knobs.

Looking at or near the Sun will cause irreversable damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.

Figure 8

Figure 9

28

Meade Mini 82 User Manual - Page 30

Meade Mini 82 Manual

Page 30 highlights