About this product
Model: wo_pleiades_111
Part Number: T-P-111BU
William Optics Pleiades 111mm F4.8 Astrograph
William Optics introduce the latest in its range of innovative WIDF Instruments.
This innovative design combines a precision (patented) internal focusing mechanism and premium 7-element (Septuplet) apochromatic optics with FPL-53 glass.
Designed to handle the newest generation of large, heavy, high-resolution cooled cameras.
The focuser is integrated inside the main tube assembly, so no focuser drawtube movement is visible from the outside.
Enjoy the benefits of a traditional two-speed fine focuser without the limitations found in conventional rear-mounted focusers.
![](/user/products/large/WIFDpleiades.gif)
Optics
Featuring a 7-element (Septuplet) apochromatic design, the Pleiades 111 works at the fast focal ratio of F4.8 and provides a wide and flat field suitable for use with large sensors.
With a focal length of 528 mm, the Pleiades 68 provides a wide field of view and is ideal for widefield imaging.
Other features include a camera angle rotator and tilt adapter.
Spot Diagram
![](/user/products/large/wo_pleiades_111_spot_diagram.jpg)
Dimensions
![](/user/products/large/wo_pleiades_111_schematic.jpg)
Features
![](/user/products/large/wo_pleiades_111_diagram_1.jpg)
![](/user/products/large/wo_pleiades_111_diagram_2.jpg)
Focuser Adjustment
![](/user/products/large/wo_pleiades_111_diagram_3.jpg)
![](/user/products/large/wo_pleiades_111_diagram_4.jpg)
Tilt Adjuster
![](/user/products/large/wo_pleiades_111_diagram_5.jpg)
Fitting a ZWO EAF Motor Focuser
![](/user/products/large/wo_pleiades_111_diagram_6.jpg)
![](/user/products/large/wo_pleiades_111_diagram_7.jpg)
NOTE:
Before storing, please allow the telescope optics and components to dry thoroughly and be free of moisture or dew (condensation).
To prevent potential damage to the optical elements, always store the telescope at a consistent temperature and in a dry environment.
If cared for this way, your telescope will provide many years of reliable service.
What's in the box
- Pleiades 111 F4.8 Optical Tube
- Tube Rings
- Dew Shield
- Dust cover with Bahtinov mask
- Cat Handle
- Losmandy-style Mounting Plate
- M48 and M54 Adapters.
- Soft Case
Specifications
Aperture | 111 mm |
Focal length | 528 mm |
Focal ratio | f/4.8 |
Image circle | >Full frame (45mm) |
Focuser | WIFD (WO Internal Focuser Design) compatible with EAF |
Retracted length | 645 mm |
Extended length | 785 mm |
Dew shield circumference | 493 mm |
Dew shield diameter | 155 mm |
Weight OTA only | 7.955kg / 17.54lbs |
Weight OTA with rings, dovetail and saddle | 10.315kg / 22.74lbs |
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FAQ
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