William Optics Pleiades 111 Astrograph

The William Optics Pleiades 111 Astrograph is a premium 111mm f/4.8 7-element imaging APO designed for serious deep-sky astrophotography with large, high-resolution cameras. With a 528mm focal length, Super ED glass, WIFD internal focusing, camera angle rotation, and tilt adjustment, it is built for astrophotographers who want sharp, high-contrast imaging performance in a dedicated astrograph.

Who Is This Product Best For?

The Pleiades 111 is best for experienced astrophotographers using full-frame, APS-C, or Micro Four Thirds cameras who want a fast, premium imaging telescope for nebulae, galaxies, star fields, and detailed deep-sky targets. It is a strong choice for advanced backyard imagers, permanent setups, and customers who value a purpose-built optical system for imaging rather than visual observing.

Why Choose This Product?

• 111mm aperture: Provides serious light-gathering ability for deep-sky imaging.
• Fast f/4.8 focal ratio: Helps capture faint objects efficiently.
• 7-element astrograph optical system: Designed for sharp, well-corrected astrophotography performance.
• 528mm focal length: A versatile focal length for nebulae, galaxies, and star fields.
• WIFD internal focuser: Maintains stability with heavier camera systems.
• Integrated rotator and tilt adapter: Helps with framing and corner-to-corner image optimization.

Recommended Uses

• Deep-sky astrophotography
• Nebula and galaxy imaging
• Full-frame and APS-C imaging systems
• Advanced backyard astrophotography
• Permanent or semi-permanent observatory setups

Compatibility and Accessory Notes

The Pleiades 111 includes a tilt adjuster rotator with M48 and M54 camera adapters. It supports common camera mount ecosystems including Canon EF, Canon RF, Nikon F, Nikon Z, Sony E, Pentax K, Micro Four Thirds, and Fuji X. William Optics recommends a precise 55mm backfocus setting, and customers should carefully confirm camera spacing, filter wheel thickness, and adapter requirements before imaging.

Important Limitations

The Pleiades 111 is an astrophotography-only telescope and does not support visual observation. It is best for customers building a dedicated imaging system, not customers looking for an eyepiece-based visual telescope.

Frequently Asked Questions

Is the Pleiades 111 good for beginners?

It is best for experienced imagers or serious beginners who are comfortable with equatorial mounts, guiding, backfocus spacing, focusing, and image processing.

What type of astrophotography is it best for?

It is best for deep-sky astrophotography, including nebulae, galaxies, star fields, and full-frame camera imaging.

Does it need a flattener?

No. The Pleiades 111 is designed as a 7-element astrograph and does not require a separate flattener.

Can it be used visually?

No. William Optics specifies that this telescope is designed for astrophotography and does not support visual observation.

Our Recommendation

The William Optics Pleiades 111 is a strong choice for astrophotographers who want a premium, fast, mid-focal-length astrograph for detailed deep-sky imaging. Choose it if you need more aperture and reach than compact astrographs while keeping the image train purpose-built for cameras. Do not choose it if your goal is visual observing.

Optical Diagram Reports

The following optical report graphic is included for customers who want to review optical performance.