Astromania 2" 90-degree 99% Enhanced Dielectric Diagonal Mirror uses multi-layered dielectric coatings in order to ensure a maximum reflection of 99% with the highest contrast and optimal sharpness. The residual stress in the plane mirror which can occur with the dielectric vapour deposition process is ruled out here. This slip fit 2-inch diagonal with 1.25-inch adapter, plus the Schmidt Cassegrain thread to 2-inch accessory adapter and other Schmidt Cassegrain rear thread s crew-on systems, is compatible with both slip-fit and s crew-on mounting systems. The optics are made with Pyrex glass and comes with dielectric coatings for the most light transmission possible.

Beside eyepieces, a star diagonal is one of the most important accessories. What is the use of a good objective or the best eyepiece if the star diagonal is inferior? We recommend the Astromania 2" 90-degree 99% Enhanced Dielectric Diagonal Mirror to everyone, including those working with high end instruments. The star diagonal permits full illumination of 2” wide field eyepieces.

• Multi-layered Dielectric Coatings & 99% Reflectivity

Multi-layered dielectric coatings that order to ensure a maximum reflection of 99% with the highest contrast and optimal sharpness for brighter, sharper images. Comes with dielectric coatings for the most light transmission possible. The residual stress in the plane mirror which can occur with the dielectric vapour deposition process is ruled out here.

• 90° Comfortable Angle

View the object at 90 degrees from the direction the telescope is pointing. This makes observations quite comfortable when the telescope is at or near the zenith.