Highlights

Superior Optical Precision

The William Optics Pleiades series features advanced 7-element optical systems, ensuring sharp, vibrant images with minimal chromatic aberration, perfect for capturing detailed celestial scenes.

Versatile Imaging Capabilities

With a large image circle supporting full-frame to medium-format sensors, the Pleiades series offers multiple sizes and focal lengths—flexible options for every astrophotography setup.

Professional Adjustability

Built for experts, the Pleiades series allows precise adjustment of focus, tilt, and alignment — engineered for total control and unmatched precision.

Pleiades.

7 Elements
APO Design

with Three Ohara ED Glasses

Minimizes chromatic aberration

Our advanced optical system is engineered to deliver sharp, vibrant images with true-to-life colors, significantly reducing chromatic aberration.

Three Extra-low Dispersion (ED) glasses

Integrated into our design to enhance image clarity by reducing color fringing and improving contrast.

Needs NO Flattener

The 7-element design inherently flattens the field, eliminating the need for an external field flattener.

Superior color correction and sharpness

Using super ED glass, our system ensures superior color correction and sharpness across the entire field of view.

High-precision polishing

Our lenses undergo high-precision polishing, setting a standard of excellence that surpasses industry norms, ensuring optimal performance in all conditions.

Sharp And Quick Aperture

Pleiades 68	Pleiades 111
f/3.8	f/4.8
Pleiades 181
f/5.5

WIFD Focuser

The William Optics Internal Focus Design (WIFD) places the focusing mechanism at the center of the telescope to achieve optimal structural balance, which directly leads to the following benefits:

Eliminates Tube Tilt
By centering the focusing system, WIFD eliminates tube tilt caused by the weight of cameras and accessories.
Unobstructed Optical Path
Without a traditional rear drawtube, WIFD prevents optical path obstruction and maintains consistent light throughput.
Cleaner, Low-Maintenance Focusing System
The sealed internal focusing mechanism minimizes dust exposure, making the system easier to maintain and reliable over long-term use.

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Fast and accurate focusing

Integrated Bahtinov mask in dew shield cap (Patent number: US 10,564,409 B2) ensures precise focusing. Made of high-definition and stable optical PMMA. Enhances astrophotography experience with quick and accurate adjustments.

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