WILLIAM OPTICS RedCat 71 Petzval Refractor Telescope User Guide
- June 1, 2024
- WILLIAM OPTICS
Table of Contents
WILLIAM OPTICS RedCat 71 Petzval Refractor Telescope
PARTS
- A. M48 Dust Cap/Thread
- B. Tilt Adapter
- C. Camera Angle Rotator
- D. Rotator Tension Knob
- E. Saddle Handlebar
- F. Helical Focuser with 2GT Gear Ring
- G. Arca Swiss/Vixen Plate
- H. Mounting Rings
- I. Dew Shield with Focus Tension Ring
- J. Super Bright Bahtinov Mask
2GT Gear Ring [F]
- 1 53 teeth, Diameter 98mm, width 8mm
Focuser Tension Adjustment [I]
Helical focuser tension can be adjusted using a dew shield which is also a
focuser tension ring. To add the tension, you have to turn the dew shield
counterclockwise. The Focuser cannot be completely locked. Adding too much
tension can damage the focus.
Camera adapter
- Remove part [A] M48 Dust Cap from the Redcat, make sure the [D] rotator tension knob is tightened then attach the
- T-Mount that is compatible with your Camera or CCD.
Rotator
- Loosen the Rotator Knob part [D] to set the camera to the desired angle.
- Please make sure the camera mount is tightened before this step.
Base Mounting Options
- Mounting Plate [G] can be inverted for two types of mount, Arca Swiss or Vixen.
- Remove the screw on the bottom of the Mounting Ring, flip it over to change the mount type, or slide forward/backward to change the balance position. The default is Vixen.
REDCAT 71 OPTIONAL ACCESSORIES
Camera Mount
- Canon
- Nikon
- Sony a
- Fuji
- Pentax
- Micro 4/3
Cinematography
Astrophotography
- Red Dot Sight
- STC
- Astro-Multispectra Filter
- Astro Duo-Narrowband Filter
- M-G50RIII + M-GR50|IRD (optional)
SPECIFICATION
- Focal Length : 348mm
- Diameter: 71 mm
- Aperture: f/4.9
- Focuse r: Helical Focuser with 2GT Gear Ring
- Image Circle : >43mm
- Tube Length(with dew shield) : 435mm
- Dew Shield Circumference: 323.4mm
- Dew Shield Diameter : cpl 03mm
- Weight: 6.21bs / 2.8kg (OTA only)8.21bs / 3.7kg (OTA with ring, dovetail and saddle)
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