Series 5000 2 inch Enhanced Dielectric Telescope Diagonal
Best high performance upgrade for serious amateur astronomers.
This diagonal is the essential upgrade for squeezing every last photon of detail out of your telescope. By prioritizing high-end dielectric coatings and a rock-solid build, it delivers brighter, crisper views. You sacrifice a bit of budget compared to standard prisms, but the gain in clarity and versatility is immediately obvious.
$179.99
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Who it's for
- Stargazers seeking the brightest possible views of distant galaxies
- Astrophotographers and visual observers using heavy professional-grade equipment
- Collectors wanting to maintain the pristine condition of expensive eyepieces
Who should skip it
- Users with compact portable setups sensitive to weight distribution
- Budget-conscious hobbyists looking for a basic entry-level upgrade
- Owners of small fork-mounted SCTs with limited clearance
Performance breakdown
Light Transmission
Dielectric coatings deliver near-perfect light throughput for bright, high-contrast views.
Build Quality
Anodized aluminum housing offers a robust, premium feel that lasts.
Thermal Stability
Pyrex substrate minimizes image distortion during rapid outdoor temperature shifts.
Equipment Compatibility
Included adapters make switching between eyepiece sizes and telescope types seamless.
Security and Safety
Compression ring design protects expensive eyepieces from marring and accidental drops.
Ease of Installation
Straightforward setup allows for quick integration into existing optical chains.
Key Specs
Accessory Type
Diagonal
Barrel Diameter
2 inches
Material
Aluminum and Pyrex glass
Compatibility
Refractor and SCT telescopes
Optical Coating
Enhanced dielectric
Reflectivity
99%
Included Items
SCT adapter, 1.25-inch eyepiece adapter
Know before you buy
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