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23_english, Leaning your telescope – Sky-Watcher EQ2 MOUNT User Manual

Page 23

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Fig.x

Fig.w

Secondary

mirror

Primary mirror

stop and keep your

hand here

Both mirrors aligned

with collimating cap in

Both mirrors aligned with

eye looking in focuser

23

Aligning the primary mirror

Find the three locking screws at the back of your telescope and loosen them by a few turns.

hex bolt (Locking screw)

Adjusting screw

Adjusting screw

Locking screw

Adjusting screw

Locking screw

If you see 3 large nuts protruding

from the back of your telescope

and 3 small Phillip's-head screws

besides them, the Phillip's-head

screws are the locking screws and

the large nuts are the adjusting

screws.

If you see 6 Phillip's-head screws

but 3 protruding from the back

of your telescope, the 3

protruding screws are locking

screws and the ones next to

them are adjusting screws.

If you see 3 hex bolts and 3 Phillip's head

screws, the hex bolts are the locking screws

and the Phillip's-head screws are the

adjusting screws. You will need an Allen

wrench to adjust the locking screws.

Now run your hand around the front of your telescope

keeping your eye to the focuser, you will see the

reflected image of your hand. The idea here being to

see which way the primary mirror is defected, you do

this by stopping at the point where the reflected

image of the secondary mirror is closest to the

primary mirrors' edge (Fig.w).
When you get to that point, stop and keep your hand

there while looking at the back end of your telescope,

is there a adjusting screw there? If there is you will

want to loosen it (turn the screw to the left) to bring

the mirror away from that point. If there isn't a

adjusting screw there, then go across to the other side

and tighten the adjusting screw on the other side. This

will gradually bring the mirror into line until it looks

like Fig.x. (It helps to have a friend to help for primary

mirror collimation. Have your partner adjust the

adjusting screws according to your directions while

you look in the focuser.)
After dark go out and point your telescope at Polaris,

the North Star. With an eyepiece in the focuser, take

the image out of focus. You will see the same image

only now, it will be illuminated by starlight. If

necessary, repeat the collimating process only keep

the star centered while tweaking the mirror.

C

leaning your telescope

Replace the dust cap over end of telescope whenever not in use. This prevents dust from settling on mirror or

lens surface. Do not clean mirror or lens unless you are familiar with optical surfaces. Clean finderscope and

eyepieces with special lens paper only. Eyepieces should be handled with care, avoid touching optical surfaces.

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