William Optics Diagonal
Best premium upgrade for amateur astronomers seeking superior optical clarity.
This is the essential upgrade for anyone serious about squeezing more light and contrast out of their telescope. The dielectric coatings deliver noticeably brighter, sharper views, while the carbon fiber construction keeps things impressively lightweight. It’s a premium piece of kit that prioritizes optical performance without weighing down your focuser.
$172.00
at
Williamoptics
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Who it's for
- Astrophotographers seeking a stable and durable optical connection
- Visual observers wanting the brightest possible celestial images
- Owners of expensive eyepieces who want to prevent surface damage
Who should skip it
- Users with lightweight mounts or small portable refractor setups
- Budget-conscious hobbyists looking for a basic entry-level upgrade
- Owners of compact Schmidt-Cassegrain telescopes on restricted mounts
Performance breakdown
Optical Clarity
Dielectric coatings deliver exceptionally bright, high-contrast views of deep-sky objects.
Build Integrity
Precision machining and robust materials ensure long-term alignment and durability.
Weight Efficiency
Carbon fiber construction minimizes focuser strain without sacrificing structural rigidity.
Compatibility
Standard two-inch barrel integrates seamlessly with most modern telescope focusers.
Light Transmission
Advanced coatings maximize photon throughput for vivid, detailed celestial observations.
Aesthetic Design
Sophisticated carbon fiber accents offer a premium look for high-end setups.
Key Specs
Barrel Diameter
2 inches
Coating
Dielectric
Material
Carbon Fiber and Aluminum
Accessory Type
Diagonal
Connection Interface
2 inch
Astrophotography Ready
Yes
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