William Optics Apochromatischer Refraktor Pleiades 181 AP 181/998 Astrograph OTA

⭐ Quick Overview

Refractor-Class Optics At An Extraordinary Aperture

Large-aperture apochromatic refractors are prized in astrophotography for their inherently clean optical path: no central obstruction, no diffraction spikes and minimal maintenance compared with mirror-based systems. The Pleiades 181 pushes this concept to a genuinely rare aperture, delivering the light-gathering power more typically associated with reflectors, combined with the pristine image quality refractor imagers seek.

Every element of the Pleiades 181 — from its multi-element lens design to its rigid, precision-machined tube — is engineered to maintain critical optical alignment and thermal stability across long, demanding imaging sessions.

🌌 What Can You Image With The Pleiades 181?

🏆 Flagship Build Quality

⭐ A Statement Telescope For Serious Imagers

The Pleiades 181 is positioned at the very top of William Optics' refractor lineup, intended for imagers and observatories who have already worked with smaller apochromats and want to move to the next level of aperture without sacrificing refractor-quality optics.

🎯 Perfect For

📸 Engineered Exclusively For High-End Imaging

Sold as an optical tube assembly, the Pleiades 181 is intended to be paired with a heavy-duty equatorial GoTo mount capable of supporting its substantial weight, along with a high-resolution astronomy camera, forming the core of a top-tier permanent or observatory imaging setup.

💡 Deployment Tips For Best Results

• Use a mount rated well above the combined weight of the tube and imaging train for the steadiest tracking.
• Allow ample time for thermal equalisation before critical focusing sessions.
• Careful collimation checks are recommended after transport.

📊 Technical Specifications

📦 Included Accessories

❓ Frequently Asked Questions