Quality affordable mirror diagonal for refractors and cassegrain telescopes
The ProStar 90 degree 1.25-inch star diagonal is an affordable replacement or spare for your refractor or cassegrain telescope.Note: is not threaded for filters.
With 98% mirror reflectivity and optical coatings for performance longevity it prevails as excellent quality 1.25-inch star diagonal for optimal performance with any 1.25-inch ocular.
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