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polaris 127 мм
Инструкция по эксплуатации Страница: 23

Meade polaris 127 мм Инструкция по эксплуатации онлайн [23/28] 159832

Meade polaris 80 мм Инструкция по эксплуатации онлайн [23/28] 159826

grasping the secondary holder with your

hand, tilt the secondary mirror holder until you

see the primary mirror become as centered

in the reflection of the diagonal mirror as

possible. Once you are at the best position,

thread in the 3 Phillips-head secondary mirror

collimation screws to lock the holder in place.

Then, if necessary, make adjustments to

these 3 Phillips-head screws to refine the tilt-

angle of the secondary mirror until the entire

primary mirror can be seen centered within

the secondary mirror reflection. When the

secondary mirror is correctly aligned, it will

look like Fig. 16 (Note: The primary mirror is

shown out of alignment).

C. PRIMARY MIRROR ADJUSTMENTS

If the secondary mirror (1, Fig. 16) and the

reflection of the primary mirror (2, Fig. 16)

appear centered within the draw tube (3, Fig.

16), but the reflection of your eye and the

reflection of the secondary mirror (4, Fig. 16)

appear off center, you will need to adjust the

primary mirror tilt screws of the primary mirror

cell (2, Fig. 13). These primary tilt screws

are located behind the primary mirror, at the

lower end of the main tube.

To adjust the primary mirror tilt screws (2, Fig

13), first turn by several turns, the primary

mirror cell lock knobs (3, Fig. 13) that are next

to each primary mirror tilt screw. The three

primary mirror cell locking screws are Phillips

head screws on all Polaris models.

Then by trial-and-error, turn the primary mirror

tilt knobs (2, Fig. 13) until you develop a feel

for which way to turn each knob to center the

reflection of your eye. Once centered, as in

Fig. 14, turn the 3 primary mirror cell locking

screws (3, Fig. 13) to re-lock the tilt-angle

adjustment.

NOTE: Some models have large thumb knobs

for the primary mirror cell tilt knobs(2, Fig 13).

Other models have Phillips head screws as

the primary mirror cell tilt screws. On these

models, the primary mirror cell tilt screws (2,

Fig 13) are the screws that have the screw

heads touching the rear cell.

D. STAR TESTING THE COLLIMATION

With the collimation performed, you will want

to test the accuracy of the alignment on a

star. Use the 25mm 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 Fig. 17C. (An improperly aligned

telescope will reveal elongated circles (Fig.

17A), with an off-center dark shadow.)

•If the out-of-focus star disk appears

elongated (Fig. 17A), you will need to adjust

the primary mirror adjusting tilt screws of the

primary mirror cell (3, Fig. 13)

•To adjust the primary mirror tilt screws (3,

Fig. 13), first unscrew several turns the 3

hex-head primary mirror cell locking screws

(2, Fig. 13), to allow free turning movement

of the tilt knobs.

•Using the flexible cable controls move the

telescope until the star image is at the edge

of the field-of-view in the eyepiece, as in Fig.

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.

Meade polaris 127 мм Инструкция по эксплуатации онлайн [23/28] 159832

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