WILLIAM OPTICS FluoroStar 91 Telescope User Manual
- June 5, 2024
- WILLIAM OPTICS
Table of Contents
FLUOROSTAR 91
MANUAL
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.
SPECIFICATION
- Focal Length: 540mm
- Diameter: 91mm
- Aperture: f/5.9
- Focuser : 3″ R &P Focuser
- Image Circle : >43mm
- Retracted Length: 441 mm
- Extended Length: 510mm
- Dew Shield Circumference: 383mm
- Dew Shield Diameter: c1)122mm
- Weight : 18Ibs / 4.165kg (OTA only) 1 2.291bs / 5.575kg (OTA with ring, dovetail and saddle)
PACKAGE CONTENTS
A. Bahtinov Mask
B. OTA
C. 120mm Saddle Handle Bar
D. Visual Extention Tube
E. 2″ RotoLock Visual Back Adapter
F. Long Version Vixen-style Dovetail Plate
G. Soft Carry Case
PARTS
A. 2″ RotoLock Visual Back Adapter
B. Visual Extention Tube
C. Camera Angle Rotation Locking Screw
D. Dual Speed 3.3″ R&P Focuser
E. Focuser Rotation Locking Screw
F. Mounting Rings / Knobs
G. 120mm Saddle Handle Bar
H. Dew Shield Locking Screw
I. Dew Shield| J. Lens Cover with Bahtinov Mask
K. Camera Angle Rotator
L. 10:1 Ratio Fine Knob & Cap
M. Long Version Vixen-style Dovetail
N. Locking Screws on Saddle Handle Bar (M4)
0. M5 Screw Holes
P. M6 Screw Holes
Q. Focuser Adjusting Knob with Thermometer
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TELESCOPE DIAGRAM
Tilt Adjustment Screws (2 mm Allen Key)
Draw Tube Adjustment Screws (3 mm Allen Key)
Can be Removed to Attach the Moto (2 mm Allen Key & your hands)
The focuser drawtube smoothness should be adjusted ONLY when necessary by progressively tightening the screw until you reach the desired smoothness.
NOTE: DO NOT ADJUST IT BEFORE ASKING WO
OPERATION GUIDE
How to Connect the Flattener
Step 1.
Remove the visual extension tube by unscrewing it from the focuser.
Step 2.
Connect the flattener to the focuser by screwing it onto the M92 thread.
ACCESSORIES MAP
Visit the W.O. webpage for details by Scanning the OR Code of the products
