WILLIAM OPTICS PLEIADES 68 Refractor Telescope Instruction Manual
- September 4, 2024
- WILLIAM OPTICS
Table of Contents
PLEIADES 68 Refractor Telescope
Instruction Manual
PLEIADES 68 Refractor Telescope
Warning
Never aim your telescope or finder scope at the Sun without proper Solar
filters installed on the front of the telescope. Doing so for even a moment
may permanently damage your vision. Proper Solar filters consist of filters
made by reputable manufacturers, designed to fit tightly over the front of the
dew shield. Solar eyepiece filters are not considered safe, and should not be
used. With proper front mounted Solar filters, the telescope will not be
harmed by viewing the Sun.
- Focal Length : 260mm
- Diameter : 68mm
- Aperture : f I 3 .8
- Focuser : WIFD (WO INTERNAL FOCUS DESIGN) Patented (Compatible with EAF)
- Image Circle : »Full Frame (45mm)
- Retracted Length : 366mm
- Extended Length : 4 l Om m
- Dew Shield Circumference : 3 2 5 mm
- Dew Shield Diameter : cpl 03mm
- Weight: 6.571bs I 2.980kg (OTA only) 8.451bs I 3.835kg (OTA with ring, dovetail and saddle)
NOTE:
We are using a new lens cell design in the WO Pleiades series telescopes. This
design incorporates the use of high-quality FPL-53 glass for superior optical
performance. Before storing your telescope, it is crucial to allow it
sufficient time to acclimatize to room temperature. Please ensure that the
telescope is thoroughly dry, free of dew or moisture, before storing. This
ensures the safety and longevity of the telescope’s components.
Always store the telescope in a consistent-temperature and dry environment to
prevent any potential damage to the optical elements. Remember to leave the
tube uncovered and opened during the acclimatization period. As always, taking
appropriate care of your telescope will ensure its optimal performance and
extend its lifespan.
Back Focus
Critical Backfocus Information:
The recommended backfocus for our 68 telescope is precisely 55mm.
Given its fast F ratio, maintaining an exact 55mm backfocus is crucial for
optimal performance. Please ensure accurate adjustment to enhance the
sensitivity and overall functionality of your telescope.
A. Dust Cover with Bahtinov Mask
B. Dew Shield
C. Main Tube
D. 120mm Saddle Handle Bar
E. Camera Angle Rotation Device
F. Tilt Adapter (inside)
G. 21 Omm Vixen Style Dovtail Plate
H. M54 or M48 Camera Mount Adapter
I. Soft Carry Case 
A. Rear Dust Cap (M54 or M48)
B. 120mm Saddle Handle Bar
C. WIFD Focuser
D. Dew Shield Locking Screw
E. Dew Shield
F. Lens Cover with Bahtinov Mask
G. Front Bahtinov Mask Cover
H. M6 Screw Holes for Finder Bracket
I. Camera Angle Rotator
J. 21 Omm Dovetail
K. 2 Speed 10: 1 Ratio Fine Knob
L. M4 Screw Holes for Finder Bracket
M. Locking Screws on Saddle
Handle Bar (M4)
N. Camera Angle Rotation Lacking Screw
0. Mounting Rings I Knobs
P. Focuser Adjusting Knob with Thermometer
Q. Camera Mount Adapter (M54 or M48) 
Attention: Our
telescope does not feature an internal M48 filter thread due to its proximity
to the second lens group near the camera adapter. This design choice prevents
interference with the lenses within the telescope tube, making direct
attachment of a 48mm filter challenging. For optimal results, we recommend
using a filter wheel attached to either M48 or M54 thread. This ensures
seamless filter usage without compromising the telescope’s optical
performance. 
R & P GEAR SPACING SCREWS
- Adjustment Screws (3 mm Allen Key) – Pull Screw
- Adjustment Screws (2 mm Allen Key) – Push Screw
- Can be Removed to Attach the Electronic Motorized
- Device such as EAF (Please refer to the instructions on page 13)
- Tension Screw
- Do Not Touch
The focuser smoothness adjustment ONLY when necessary by progressively push &
pull screws until you reach the desired smoothness.
NOTE:
DO NOT ADJUST IT BEFORE ASKING WO
Where Is the Tilt Adapter?
Step 1.
Remove the rotator knob.
Step 2.
Twist the cover. Step 3.
The tilt adapter is inside.
Where Is the Tilt Adapter? Step 4.
Remove the cover when you need to adjust it.
How to Install EAF
Step 1.
Remove the top screw with 2mm Allen key.
Step 2.
Release two inner knob screws. How to Install EAF Step 4.
Align the screw holes. Step 5.
Lock two set screws on shaft. Step 6.
Tighten both bracket screws. 
NOTE:
Ensure proper alignment by loosening the mounting rings and adjusting the
telescope on the mount to guarantee that both knobs on either side of the
focuser are even and parallel to the mount to prevent any interference with
the knobs impacting the mount’s saddle plate.
Cinematagraphy
https://williamoptics.com/products/accessories/adapters/camera-t-mount- adapters
Astrophotography
https://williamoptics.com/products/telescope/finder/bist-buy-red-dot-finder-
kit-with-vixen-style-mounting-
base
https://williamoptics.com/products/accessories/filters
Documents / Resources
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WILLIAM OPTICS PLEIADES 68 Refractor
Telescope
[pdf] Instruction Manual
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