Orion Twist-Tight Dielectric Mirror Star Diagonal
Best high-clarity upgrade for serious amateur astronomers seeking sharper, brighter views.
This high-performance accessory offers superior light transmission and a secure, scratch-free connection for eyepieces. Its robust construction and advanced coatings ensure maximum brightness and contrast for detailed celestial viewing.
$179.99
More Dielectric Mirror Diagonal options
Who it's for
- Deep-sky observers seeking maximum image brightness and contrast
- Eyepiece collectors wanting scratch-free, perfectly centered optics
- Stargazers desiring expansive, wide-field views of the night sky
Who should skip it
- Owners of smaller telescopes with limited focuser capacity
- Casual astronomers on a strict, entry-level budget
- Users restricted to standard 1.25-inch telescope focusers
Performance breakdown
Optical Reflectivity
Dielectric coatings deliver near-perfect light transmission for exceptionally bright, high-contrast views.
Eyepiece Security
The twist-tight mechanism locks eyepieces firmly without marring delicate barrel surfaces.
Build Durability
Machined aluminum housing offers a premium, rugged feel that withstands heavy field use.
Glare Suppression
Internal threaded baffles effectively minimize stray light for cleaner, sharper planetary observations.
Versatility
Seamlessly handles 2-inch and 1.25-inch eyepieces with the included adapter.
Filter Compatibility
Standard threading allows for quick integration of essential contrast-enhancing filters.
Key Specs
Angle
90 degree
Diagonal Barrel Size
2 inch
Connection Interface
2 inch
Accessory Type
Diagonal, Adapter
Optical Coating Type
Fully Multi-Coated
Material
Aluminum
Barrel Diameter
2.0 inches
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