Designed with astrophotographers in mind, this portable, large aperture telescope provides exceptional astrophotography performance with the inclusion of 7 optical lenses. Take stunning images of your favorite celestial objects with sharpness, clarity, and contrast. Equipped with William Optics’ patented internal focus design, a fast focal ratio of f/4.8, and a plethora of accessories, this Pleiades 111mm refractor is guaranteed to level up your astrophotography
Utilizing high quality FPL-53 glass and a wide aperture of 111mm, this apochromatic refractor delivers incredibly sharp photos. As the optics themselves move to reach focus as opposed to the imaging equipment, the fixed body of this telescope provides rigidity and stability to your set up. This design also eliminates vignetting issues seen with typical rear focusers! To aid in functionality, William Optics has included various accessories to go along with your Pleiades 111 telescope. For a sleek and sophisticated look, these accessories are color coded with the blue and black style of the Pleiades line of telescopes!
Integrated Tilt Adapter
William Optics has furnished this Pleiades 111 with an integrated tilt adapter, allowing you to adjust the sitting angle of your camera if needed. Simply adjust the screws on this adapter with a 1.5mm Allen key in a push or pull manner. This inclusion maximizes your image quality by providing sharp focus across the entire frame!
Enhance You Experience With These Endless Additions!
The Pleiades 111 is loaded with features sure to take your astrophotography to the next level. The premier optics provide stunning photos filled with clarity and the internal focuser offers a robust mounting system for your camera. Enjoy this telescope from anywhere, as the included saddle handlebar and compact design makes this refractor the perfect travel telescope. See below why the Pleiades 111 deserves a place among your astro imaging gear!
Pristine Optics
By including 7 optical elements, the astrophotography performance of the Pleiades 111 is unmatched. Carefully designed glass provides superb color correction within this apochromatic refractor. It’s difficult to find a focal length of 530mm while still reaping the benefits of an aperture as wide as 111mm, such as on this Pleiades refractor. The resulting f/4.8 ratio presents a speedy system for images filled with brightness and contrast. Please Note: William Optics has implemented a new lens cell design for their impressive new Pleiades line of telescopes. This new design requires a bit of extra attention to ensure the safety and longevity of the optics. William Optics recommends that when not in use the telescope be thoroughly dried, so as to be free of moisture or dew, and then stored in a dry, consistent temperature, space. When storing the telescope they recommend leaving it uncovered while it acclimates to room temperature slowly.
Internal Focuser Design with EAF Compatibility
In typical rear mounted focus designs, the imaging system is moved back and forth, changing the length of optical assembly. This change in length can prove troublesome when using heavy imaging equipment such as weighty cameras and filter wheels. A shift in balance can result in an unstable imaging train, putting a damper on the image quality. Understanding this concern, William Optics has created an internal focusing design to provide rigidity and stability to your set up. Instead of moving the imaging equipment, the optics within the telescope itself moves, providing a solid, fixed system. This focuser design also prevents any vignetting seen with traditional focusers. A dual speed 10:1 Rack & Pinion focuser controls this WIFD, delivering smooth and precise focusing!
Abundant Additions
Setting you up for success, William Optics has included numerous accessories with your Pleiades 111. The dual dust cover/Bahtinov mask makes manual focus effortless, and the saddle handlebar allows for user supplied accessories such as the William Optics UniGuide or the Apertura 32 mm Guide Scope. Also included is a retractable dew shield, mounting ring, dovetail, and camera rotator. With these functional and chic additions, William Optics has you imaging in style!
Powerful & Portable
Thanks to its saddle handlebar, this Pleiades 111 is an easy grab and go system for any astro imaging adventure! The polished look of these high performance optics lets you show up in style to your next star party or camping trip. Affix your telescope to your favorite mount and see the impressive capabilities of this apochromatic refractor under dark skies!
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SKU Number
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WYO-T-P-111BU |
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Model Number
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T-P-111BU |
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Telescope Series
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William Optics Pleiades |
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Focal Ratio
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f/4.8 |
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Optical Design
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Refractor |
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Telescope Aperture
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111mm (4.37") |
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Telescope Mount Type
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No Mount - OTA Only |
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Type of Electronics
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OTA Only - No Electronics |
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Number of Refractor Elements
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7 (Septuplet) |
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Focal Length (mm)
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530 |
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Image Circle
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45mm |
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Focuser Style
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Rack & Pinion |
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Focuser Speed
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Dual Speed |
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Telescope OTA Outside Diameter (in.)
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4.37 (111mm) |
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Refractor Dew Shield Diameter (in.)
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6.1 (155mm) |
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Telescope OTA Weight (lb.)
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17.54 |
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Refractor OTA Length - Extended (in.)
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30.9 |
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Refractor OTA Length - Retracted (in.)
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25.4 |
What's in the box:
- Pleiades 111mm APO Refractor OTA
- M48 and M54 Camera Adapter
- Dust Cover with Bahtinov Mask
- Camera Angle Rotation Device
- Losmandy Style Type D Mounting Plate
