TeleVue 1.25インチ90度エバーブライトダイアゴナル - DPC-1250

I was skeptical about spending this much on a diagonal, but the 99% reflectivity of the Everbrite coating really does make a visible difference in how bright and crisp stars appear, even on my smaller scope.

Swapping in this diagonal instantly cleaned up the views of Jupiter's bands—the contrast is noticeably better than my old prism. It holds collimation perfectly even when I swap eyepieces quickly. Glad I finally upgraded.

The 99% reflectivity claim isn't hype—I can actually see fainter stars in my dob without cranking up the magnification. The 90-degree angle makes viewing at the eyepiece feel natural, and the mirror stays crisp even on cold nights.