Meade 114EQ-ASTR instruction manual Diagonal Holder Adjustments, Primary Mirror Adjustments

Meade114EQASTR 3/28/07 9:33 AM Page 19

Fig. 12

32

Primary Mirror Cell

Fig. 13

2	1
	2
4	3
	5
Correct Collimation

Fig. 14

1

3

2

Diagonal Mirror Misalignment

Fig. 15

the reflection of the diagonal mirror as possible. Once you are at the best position, thread in the 3 Phillips-head 17 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).

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

1

2

3 4

Primary Mirror Misalignment

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

C. PRIMARY MIRROR ADJUSTMENTS

If the diagonal mirror (1, Fig. 15) and the reflection of the primary mirror (2, Fig. 15)

Fig. 16

A B C

Collimation

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.