William Optics Dura Bright Dielectric SCT Diagonal
Best premium upgrade for dedicated Schmidt Cassegrain telescope enthusiasts.
This is the upgrade that finally makes your Schmidt-Cassegrain views feel truly crisp. By prioritizing a 1/10th wave mirror and high-end dielectric coatings, it delivers the contrast needed for serious planetary work. You sacrifice a bit of budget for the premium carbon fiber build, but the optical clarity is undeniable.
$172.00
at
Williamoptics
Who it's for
- Visual observers seeking the brightest possible views of faint nebulae
- Astronomers who value high-end aesthetics and rugged mechanical construction
- Collectors wanting to maintain the resale value of expensive eyepieces
Who should skip it
- Users with small mounts sensitive to shifts in equipment balance
- Budget-conscious hobbyists looking for basic functionality at a lower cost
- Multi-telescope owners who prefer universal accessories for different optical systems
Performance breakdown
Optical Clarity
Dielectric coatings deliver exceptional brightness and contrast for critical planetary viewing.
Surface Precision
The 1/10th wave accuracy ensures minimal distortion during high-magnification sessions.
Build Quality
Precision-machined aluminum and carbon fiber create a robust, premium feel.
Eyepiece Security
Compression ring system locks eyepieces firmly without leaving unsightly barrel marks.
Stray Light Control
Internal baffling effectively suppresses reflections to maintain deep, dark backgrounds.
Equipment Safety
Integrated safety stop provides peace of mind against accidental mirror damage.
Key Specs
Diagonal Type
Mirror Diagonal
Optics
DuraBright Dielectric Coatings
Reflectivity
99%
Mirror Thickness
12mm
Surface Accuracy
1/10th wave
Telescope Compatibility
Schmidt-Cassegrain
Connection Interface
SCT Threads
Barrel Diameter
2.0 inches
Filter Thread
48mm
Material
Aluminum and Carbon Fiber
Know before you buy
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Ask Metto anything about the William Optics Dura Bright Dielectric SCT Diagonal before you decide.
