The Baader Planetarium T-2 Prism Star Diagonal is easily the finest prism star diagonal available today. The right angle prism is produced by Zeiss and is the identical prism that Zeiss supplied for use with their exquisite APQ telescopes. The famous Baader Planetarium 7-Layer Multi-Coatings ensure the image is bright and contrast and the oversized prism provides an oversized full clear aperture of 1.34" (34 mm). The precision machined aluminum housing provides a stress-free mounting and precise location for the prism, unlike the typical weak plastic or crudely cast housings found on lesser diagonals.
Extremely low scatter and high contrast images are the hallmark of this prism diagonal. The end result is a lifetime diagonal that matches or exceeds the brightness and image quality of the finest mirror star diagonals. Users of fine refractors over f/7 as well as SCT users have found that the Baader Planetarium T-2 Prism Star Diagonal provides the sharpest and highest contrast images they have seen from any star diagonal, mirror or prism.