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the diagonal mirror (3, Fig. 13), the spider
vanes (4, Fig. 13), and your eye (5, Fig. 13).
Properly aligned, all of these reflections will
appear concentric (i.e., centered) as
illustrated in Fig. 13.
Any deviation from the concentric
reflections will require adjustments to the
diagonal assembly and/or the primary
mirror cell (Fig. 10).
B. DIAGONAL HOLDER ADJUSTMENTS
If the diagonal mirror (1, Fig. 14) is centered
in the drawtube (2, Fig. 14), but the primary
mirror is only partially visible in the
reflection (3, Fig. 14), the 3 Phillips-head
the reflection of the diagonal mirror as
possible. Once you are at the best
position, thread in the 3 Phillips-head
diagonal tilt screws to lock the
rotational position. Then, if necessary, make
adjustments to these 3 Phillips-head
screws to refine the tilt-angle of the
diagonal mirror until the entire primary
mirror can be seen centered within the
diagonal mirror reflecting. When the
diagonal mirror is correctly aligned, it will
look like Fig. 13 (Note: The primary mirror
is shown out of alignment).
C. PRIMARY MIRROR ADJUSTMENTS
If the diagonal mirror (1, Fig. 15) and the
reflection of the primary mirror (2, Fig. 15)
Fig. 12
3
2
Primary Mirror Cell
4
5
3
2
2
1
3
1
2
2
1
3
4
A
BC
Collimation
Primary Mirror Misalignment
Diagonal Mirror Misalignment
Correct Collimation
17
Fig. 13
Fig. 14
Fig. 15
Fig. 16
diagonal tilt screws (To adjust these screws
you must first remove an adhesive backing)
must be unthreaded slightly to the point of
where you can tilt the diagonal holder from
side-to-side by grasping the diagonal
holder with your hand and tilt until you see
the primary mirror become as centered in
Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.
Meade114EQASTR 3/28/07 9:33 AM Page 19