WILLIAM OPTICS OPTICS FLT-120 Triplet APO Refractor OTA In Red User Manual
- May 15, 2024
- WILLIAM OPTICS
Table of Contents
WILLIAM OPTICS OPTICS FLT-120 Triplet APO Refractor OTA In Red
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: 780mm
- Diameter: 120mm
- Aperture: f/6.5
- Focuser: 3.3″ R&P Focuser
- Image Circle : >43mm
- Retracted Length: 680mm
- Extended Length: 850mm
- Dew Shield Circumference: 492mm
- Dew Shield Diameter : 0155mm
- Weight : 15.66lbs / 7.105kg (OTA only) 20.84lbs / 9.455kg (OTA with ring, dovetail and saddle)
Spot Diagram
Longitudinal Aberration
NOTE
We are using a new lens cell design that includes FP53 glass in the WO triplet
series (GT and FLT series). This design is perfect for temperature
compensation to better prevent pinched optics, that can occur in cold weather
conditions.
Before storing your telescope, you must leave it uncovered, with the tube open
for enough time to allow it to adjust to the room temperature. You must make
sure the telescope is completely dry of any dew or moisture before it can be
safely stored.
The telescope should always be stored in a dry location, with a consistent
temperature.
PACKAGE CONTENTS
- A. Bahtinov Mask
- B. ОТА
- C. Saddle Handle Bar
- D. Camera Angle Rotator
- E. 2″ RotoLock Visual Back Adapter
- F. Losmandy Style Type D Mounting Plate
- G. Soft Carry Case
PARTS
- A. 2″ RotoLock Visual Back Adapter
- B. Camera Angle Rotation Locking Screw
- C. Dual Speed 3.3″ R&P Focuser
- D. Focuser Rotation Locking Screw
- E. Mounting Rings / Knobs
- F. Saddle Handle Bar
- G. Dew Shield Locking Screw
- H. Dew Shield
- I. Lens Cover with Bahtinov Mask
- J. Camera Angle Rotator
- K. 10:1 Ratio Fine Knob & Cap
- L. Losmandy Style Type D Mounting Plate
- M. Locking Screws on Saddle Handle Bar (M4)
- N. M4 Screw Holes
- O. M6 Screw Holes
- P. Focuser Adjusting Knob with Thermometer
TELESCOPE DIAGRAM
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)
- Lock & 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
OPERATION GUIDE
How to Install EAF
Step 1.
Remove the top screw with 2mm Allen key.
Step 2.
Release two inner knob screws.
Step 3.
Remove the knob.
Step 4.
Align the screw holes.
Step 5.
Lock two set screws on shaft.
Step 6.
Tighten both bracket screws.
ACCESSORIES MAP
- Vistit W.O. webpage for details by Scanning the QR Code of the products.
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