Enhance your astronomical viewing experience with this 90-degree mirror diagonal, designed specifically for refractor telescopes. This essential accessory features multi-coated optical surfaces for improved light transmission and image clarity. The diagonal's standard 1.25-inch mounting thread ensures compatibility with most refractor telescopes, making it a versatile addition to your stargazing equipment. By redirecting light at a 90-degree angle, this mirror diagonal allows for more comfortable viewing positions, especially during overhead observations. The compact design, measuring 6 x 6 x 2 inches, makes it easy to handle and store. The manual focus capability gives you precise control over your viewing experience. This diagonal mirror is an ideal solution for astronomers looking to improve their viewing comfort without compromising optical quality.