Meade Instruments LX90 ACF/SC - Manual (Page 15)

15
Aligning the Viewfinder
The viewfinder helps you locate objects and must also be aligned to the main telescope. To align
the viewfinder, perform steps 1 through 5 during the daytime; perform step 6 at night.
1. Slide the track on the bottom of the viewfinder bracket into the slot in the viewfinder
mounting assembly. See Fig. 6a. To secure the viewfinder to the mounting assembly,
tighten the two thumbscrews (Fig. 6a) to a firm feel only.
2. If you have not already done so, insert the Super Plössl 26mm eyepiece into the diagonal
prism.
3. Unlock the R.A. (Pg. 7, Fig. 1, 9) and Dec. (Pg. 7, Fig. 1, 7) locks so that the telescope
moves freely on both axes.
4. Point the telescope at some well-defined and stationary land object at least 200 yards
distant, such as the top of a telephone pole or street sign. Center the object in the
telescope eyepiece. Re-tighten the R.A. and Dec. locks.
5. Look through the viewfinder eyepiece (Pg. 7, Fig. 6b) and loosen or tighten, as appropriate,
one or more of the viewfinder alignment screws (Pg. 7, Fig. 6b) until the viewfinder
crosshairs are precisely centered on the object you previously centered in the telescope
eyepiece.
6. Check this alignment on a celestial object, such as the Moon or a bright star, and make any
necessary refinements, using the method outlined in steps 3 and 4.
Fig. 6a: Viewfinder Assembly.
Alignment
Screws
Mounting
Slot
Viewfinder
Eyepiece
Track
Fig. 6b: Viewfinder Assembly.
Thumbscrews