WILLIAM OPTICS RC51RDIII-1 RedCat 51 III WIFD Telescope User Manual

: June 16, 2024
: WILLIAM OPTICS

Table of Contents

RC51RDIII-1 RedCat 51 III WIFD Telescope
SPECIFICATION
PACKAGE CONTENTS
PARTS
TELESCOPE DIAGRAM
OPERATION GUIDE
ACCESSORIES MAP
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WIFD
RED DCAT 51
MANUAL

RC51RDIII-1 RedCat 51 III WIFD 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.

SPECIFICATION

Focal Length : 250mm (Astrograph)
Diameter : 51mm
Aperture : f/4.9
Focuser : WIFD (WO INTERNAL FOCUS DESIGN) (Compatible with EAF)
Image Circle : 45mm full frame
Tube Length : 298mm
Dew Shield Circumference : 265mm
Dew Shield Diameter : $84mm
Weight : 3.90lbs / 1.770kg (OTA only) 5.25lbs / 2.380kg (OTA with ring, dovetail and saddle)

NOTE:
We are utilizing a unique Petzval design featuring four optical elements in the William Optics (WO) Cat 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.

PACKAGE CONTENTS

A. Dust Cover with Bahtinov Mask
B. Dew Shield
C. Main Tube
D. Saddle Handle Bar
E. Camera Angle Rotation Device
F. Tilt Adapter (inside)
G. 210mm Vixen Style Dovtail Plate
H. Soft Carry Case

PARTS

A. Rear Dust Cap (M48)
B. Saddle Handle Bar
C. WIFD Focuser
D. Dew Shield
E. Lens Cover with Bahtinov Mask
F. Front Bahtinov Mask Cover
G. Mounting Ring / Knob
H. Camera Angle Rotator
L. 210mm Dovetail
J. 2 Speed 10:1 Ratio Fine Knob
K. M4 Screw Holes for Finder Bracket
L. Locking Screws on Saddle Handle Bar (M4)
M. Camera Angle Rotation Locking Screw
N. M4 Screw Holes for Finder Bracket
O. Focuser Adjusting Knob with Thermometer
P. M48 Adapter (for Camera Mount)

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 on page 12)
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

Where Is the Tilt Adapter?

Step 1.
Remove the rotator knob. Step 2.
Twist the cover. Step 3.
The tilt adapter is inside. Step 4.
Remove the cover when you need to adjust it. Step 5.
How to adjust the tilt adapter.

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.