Celestron 1.25" Dielecric Star Diagonal, with Twist Lock (93571)
$159.99
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Celestron 1.25" Dielecric Star Diagonal, with Twist Lock (93571)
$159.99
Superior Reflectivity
Over 99 percent light reflection
Dielectric Coatings
58 precision optical layers
Twist Lock Holder
Centers eyepieces without scratching
90 Degree View
Comfortable viewing angle positioning
Aluminum Body
Machined black anodized housing
Anti Glare Design
Threaded flat black interior
Brighter Stargazing PerformanceEnhance Your Telescope Optical Quality
Upgrade your night sky observation experience with the premium Celestron Dielectric Star Diagonal, 1.25" with Twist Lock. Engineered with 58 layers of dielectric coatings, this high-performance telescope accessory delivers over 99% light transmission to ensure maximum brightness and contrast during astronomical viewing.
Precision Optical EnhancementDiffraction Limited Glass Superior Alignment
The Celestron Dielectric Star Diagonal, 1.25" with Twist Lock reflects your telescope's light path 90 degrees to provide an ergonomic and comfortable viewing position when observing celestial objects. Featuring diffraction-limited BK7 glass and glare-threaded aluminum construction, it ensures crisp, high-contrast imagery without degrading your telescope's optics. The innovative twist-lock eyepiece holder uniformly clamps standard 1.25" eyepieces while maintaining perfect opto-mechanical alignment and preventing barrel scratches.
Technical SpecificationsDetailed Product Specifications and Dimensions
Diagonal Size
31.75mm (1.25") (target)
Diagonal Type
Mirror
Glass Material
BK7
Coatings
Dielectric, 58 layers
Reflectivity
Over 99%
Optical Quality
Diffraction limited
Eyepiece Holder
1.25", Twist-Lock
Compression Ring
Yes, single ring
Housing Construction
Machined aluminum black anodized
Barrel Interior
Glare threaded and painted flat black
Threads for Filters
Yes, 1.25"
Dimensions
114.3mm x 50.8mm x 88.9mm (4.5" x 2" x 3.5") (ruler)
Weight
7.5 oz (212.6 g) (scale)
Key FeaturesAdvanced Features for Expert Astronomers
Dielectric Mirror Coatings58 layers providing over 99% light reflection for maximum brightness
Twist-Lock MechanismCentering system holds 1.25" eyepieces securely without scratching barrels
Diffraction-Limited OpticsMaintains maximum optical sharpness and transmission quality
Ergonomic Viewing AngleReflects light path 90 degrees for comfortable observing sessions
Machined Aluminum HousingAnodized black body with orange accent twist ring for durability
Integrated Barrel StopPrevents long-barreled eyepieces from coming into contact with the mirror
Anti-Glare ThreadingFlat-black threaded interior eliminates stray light and reflections
Frequently Asked QuestionsEverything you need to know
What are the benefits of upgrading to the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock?
Upgrading to the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock provides over 99% light reflectivity through 58 dielectric coating layers, resulting in brighter, higher-contrast images without degrading your telescope's optical performance.
How does the twist lock work on the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock?
Instead of traditional thumbscrews that scratch barrels, the twist lock clamps evenly around your 1.25" eyepiece, centering it precisely for perfect opto-mechanical alignment.
Is the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock compatible with filters?
Yes, the 1.25" nosepiece barrel of the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock is internally threaded to accept standard 1.25" astronomy filters.
What telescopes work with the Celestron Dielectric Star Diagonal, 1.25" with Twist Lock?
The Celestron Dielectric Star Diagonal, 1.25" with Twist Lock is designed for use with refractor telescopes and Cassegrain-style telescopes (such as Schmidt-Cassegrains and Maksutov-Cassegrains) that accept 1.25" diagonals.
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