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The 50.8mm star diagonal is coated with the same aluminium layers as high-quality telescope mirrors. We achieve a maximum reflectivity of 99%, and like a telescope mirror, the coating is protected from ageing by a quartz layer. The quality of the mirror is maintained even after many years.
If you want an absolute high-end star diagonal, with excellent planarity and reflectivity, then the star diagonal with the quartz substrate is the right one. Fused silica mirrors offer a higher thermal stability and have no bothersome expansion effects through temperature differences.
- High-quality CNC body completely made of metal
- 50.8mm barrel without safety notch - no jamming possible - the mirror harmonizes perfectly with compression rings
- 50.8mm and 31.8mm accessories are gently and precisely clamped by compression rings
- Thread for 50.8mm filters at the 50.8mm barrel and at the reduction adapter for 31.8mm accessories
- Maximal illumination - even extreme 50.8mm wide angle eyepieces can be used to the full
- High-quality mirror with precise surface and 99% reflection - when observing, you will not notice any difference in brightness and sharpness, compared to direct vision