Orion Twist-Tight Dielectric Mirror Star Diagonal
Best secure accessory upgrade for serious amateur astronomers.
This diagonal replaces traditional, scratch-prone thumbscrews with a secure, twist-tight clamping mechanism that centers eyepieces perfectly. With 99% reflectivity, it delivers exceptionally bright, high-contrast views, making it a reliable upgrade for refractor or Cassegrain telescope users.
$244.99
at
GoSupps
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Who it's for
- Visual observers seeking secure and scratch-free eyepiece mounting
- Deep-sky observers wanting maximum brightness and clarity from their telescope
- Serious hobbyists looking for professional-grade hardware that lasts for years
Who should skip it
- Budget-conscious beginners who find the cost prohibitive for entry-level setups
- Owners of lightweight portable scopes sensitive to balance and payload limits
- Cold-weather observers who prioritize tactile ease of use in freezing conditions
Performance breakdown
Optical Reflectivity
Dielectric coatings deliver exceptionally bright, high-contrast views across the spectrum.
Eyepiece Security
Twist-tight mechanism eliminates wobble and prevents marring delicate eyepiece barrels.
Build Durability
Anodized aluminum housing offers a robust, premium feel for long-term use.
Glare Suppression
Internal baffling effectively minimizes stray light for cleaner, sharper planetary observation.
System Versatility
Seamlessly transitions between 2-inch and 1.25-inch setups with the included adapter.
Ease of Alignment
Self-centering design ensures your optics remain perfectly aligned every single time.
Key Specs
Material
Aluminum
Weight
567 g
Dimensions
152.4 x 82.55 x 101.6 mm
Reflectivity
99%
Barrel Diameter
2 inches
Compatibility
Refractor and Cassegrain telescopes
Know before you buy
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