Astromania Telescope Diagonal 2" 90° Diagonal Mirror 99% Reflective Coating
A 2 inch, 90-degree dielectric mirror diagonal with a stated 99% reflectivity and a Pyrex glass mirror. It ships with an SCT adapter and a 2 inch to 1.25 inch adapter for refractors and Cassegrains.
Price range: See on Amazon
What we liked
- + Multi-layer dielectric coatings on a super-flat Pyrex mirror, with reflectivity stated at over 99% for brighter images
- + Includes both an SCT to 2 inch adapter and a 2 inch to 1.25 inch adapter, so it takes both eyepiece sizes
- + Listed as suitable for refractors, Schmidt-Cassegrains, ACF, EdgeHD and Maksutov-Cassegrain telescopes
Trade-offs
- - The listing says it is not recommended for reflectors, especially Newtonians, so it is no use on a Dobsonian
- - Costs about twice as much as the budget 2 inch dielectric diagonal in this guide for the same stated reflectivity
Prices change often, so check the current price and availability on Amazon.
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