| 4" Starbright XLT optics < Return to product view Starbright XLT multicoated optics: This advanced optical coatings package includes a high reflectivity mirror with multilayer coatings of vacuum-deposited aluminum. The aluminum mirror coatings are enhanced with titanium dioxide for maximum reflectivity and then overcoated with a protective layer of silicon monoxide (quartz) for long life. A unique combination of magnesium fluoride and hafnium dioxide antireflection coating materials are used to increase the light transmission through the thick Maksutov meniscus corrector lens. These coatings are vacuum-deposited on both sides of the corrector lens for maximum light throughput and contrast. The Starbright XLT multicoatings give you higher light transmission for brighter deep space images, which is particularly important with the limited light-gathering ability of a small aperture scope. Across the total visual/photographic spectrum from 400nm to 750nm, independent laboratory tests show the new Starbright XLT coatings are 16% brighter overall than even the original industry-standard Starbright multicoatings. They also visibly increase the contrast on subtle lunar, planetary, and nebula details when compared with a scope with standard coatings or multicoatings. < Return to product view | 
